{"title":"Harken Zircon Blocks","description":"\u003cp\u003e\u003cspan\u003eSize-for-size in our expanding range, Zircon blocks are the most efficient small boat blocks Harken has ever made. At the core of Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings apart so they don’t bunch up, touch, and stop each other. The result is a very free-running block with less energy lost to friction. Give an unrigged Zircon block a strong spin, and it spins for an incredibly long time. Zircon bearings are more than 700% stronger in compression than stainless bearings of the same size. So, they stay really smooth and won’t deform--within recommended load limits. More importantly, they don’t absorb as much energy before starting to roll. This becomes evident when you need to ease a sheet or multi-part control line in light air. You can react to very slight fluctuations in line load. When used expertly, that means better sail shape and more speed.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"harken-29-mm-zircon-block-with-becket","title":"Harken 29 mm Zircon Block with Becket","description":"\u003c!-- harken-official:v2 Sku:2188 page_sha256:c01d9c4e0d5d71cca817ea6f5802ee06c5e55de969f013238af685406183911d --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe newest Zircon offerings are six models with 29 mm sheave diameters. These expand the Zircon offering from eight models to eighteen. Zircon is not an all-purpose alternative—no block is. But these smaller sizes make Zircon appropriate for control lines where multi-part purchases are required. Zircon reacts immediately. So, when the pressure gets light and you ease that 24:1 Cunningham rigged under the deck or want to let the jib lead forward for some more power through the chop, you will get response.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e480 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1050 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 1\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e54 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e6 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e160 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e350 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 1\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e29 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e22.5 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e0.79 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=27499024bcadc12e19062e0055c9491a24560e28653766c9b5d8a37fe9b49d49 --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow often should I clean and maintain the Zircon block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean the block and attachments frequently with detergent and fresh water, flushing bearings and sheave areas while rotating parts.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there mounting safety considerations for the Zircon block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eDo not lash in line with the seam, as this can split the block and cause failure. Always lash through both cheeks.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is a mounting mistake to avoid with the Zircon block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eDo not align the lashing or soft attachment with the seam, as this can split the block apart and cause it to fail.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eCan you connect an additional block to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, ensure the load is no more than 1\/3 of the upper block’s load. Do not add a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eCan I add another block to the becket of the Zircon block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, ensure the load on the added block is no more than 1\/3 of the upper block's load.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat materials are used in the construction of the Zircon block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates are made from strong and reliable fiber reinforced composite construction.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat materials are used in Zircon block construction?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates are made of strong, reliable fiber reinforced composite.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block be attached to the rig?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block, ensuring the lashing passes through both cheeks to hold the block together.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eDoes the Zircon block use ceramic bearings?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, the block features composite sheaves with low friction ceramic bearings for increased sensitivity.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block be attached to my rig?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block, ensuring the lashing goes through both cheeks to keep the block together.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat parts of the Zircon block need inspection for wear?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops regularly.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How often should I clean and maintain the Zircon block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean the block and attachments frequently with detergent and fresh water, flushing bearings and sheave areas while rotating parts.\"}}, {\"@type\": \"Question\", \"name\": \"Are there mounting safety considerations for the Zircon block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not lash in line with the seam, as this can split the block and cause failure. Always lash through both cheeks.\"}}, {\"@type\": \"Question\", \"name\": \"What is a mounting mistake to avoid with the Zircon block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not align the lashing or soft attachment with the seam, as this can split the block apart and cause it to fail.\"}}, {\"@type\": \"Question\", \"name\": \"Can you connect an additional block to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, ensure the load is no more than 1\/3 of the upper block’s load. Do not add a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"Can I add another block to the becket of the Zircon block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, ensure the load on the added block is no more than 1\/3 of the upper block's load.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are used in the construction of the Zircon block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are made from strong and reliable fiber reinforced composite construction.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are used in Zircon block construction?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are made of strong, reliable fiber reinforced composite.\"}}, {\"@type\": \"Question\", \"name\": \"How should the Zircon block be attached to the rig?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block, ensuring the lashing passes through both cheeks to hold the block together.\"}}, {\"@type\": \"Question\", \"name\": \"Does the Zircon block use ceramic bearings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the block features composite sheaves with low friction ceramic bearings for increased sensitivity.\"}}, {\"@type\": \"Question\", \"name\": \"How should the Zircon block be attached to my rig?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block, ensuring the lashing goes through both cheeks to keep the block together.\"}}, {\"@type\": \"Question\", \"name\": \"What parts of the Zircon block need inspection for wear?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops regularly.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Double","offer_id":53250990965073,"sku":"HKN-2188","price":78.22,"currency_code":"EUR","in_stock":true},{"title":"Triple","offer_id":53250990997841,"sku":"HKN-1211","price":106.23,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/41429b42-4cac-4922-8a04-a7036761c021_6fc95993-c054-4ea7-9776-d5c45b90f134.jpg?v=1773130241"},{"product_id":"harken-40-mm-zircon-triple-block-with-bkt","title":"Harken 40 mm Zircon Triple Block with BKT","description":"\u003c!-- harken-official:v2 Sku:1212 page_sha256:c2b29abcb34d0742170e8a45dcdd468ef8c30c30148d5a51dbbb923e690aaaa7 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eZircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1020 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2250 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 7\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e73 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e5\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e8 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e345 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e750 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 9\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e40 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e70 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2.47 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=591d0adcf345534ba3f9e60076d390e3f310491ef13b0f1d3bc49c69a8658f1a --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhere can I find more information about safety and warranty?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eFor additional safety, maintenance, and warranty information consult the appropriate Harken catalog or manual.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat cleaning products should be used for maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse detergent and fresh water to clean the block and attachments.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the block be attached during installation?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block, ensuring the lashing goes through both cheeks for secure holding.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there important installation cautions for lashing?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, lash only through both cheeks so the lashing is holding the block together, not split apart. Incorrect lashing can cause failure.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected for wear or damage during maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops regularly.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there precautions when adding an extra block to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eAny additional block should not bear more than 1\/3 the load of the upper block. Do not use a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat feature improves the block's efficiency?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eComposite sheaves are insert-molded with low friction ceramic bearings mounted inside caged races.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eCan a full-load separate system be used with the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eNo, do not add a fully loaded separate system to the becket block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is the construction material of the sheave and sideplates?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThey are made from strong and reliable fiber reinforced composite construction.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat materials are used in the core construction of Zircon blocks?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe Zircon block features composite sheaves insert-molded with low friction ceramic bearings and has fiber reinforced composite construction for the sheave and sideplates.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is the correct method for lashing the block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eEnsure the lashing goes through both cheeks, not in line with the seam. Lashing along the seam can split the block apart and cause failure.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Where can I find more information about safety and warranty?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For additional safety, maintenance, and warranty information consult the appropriate Harken catalog or manual.\"}}, {\"@type\": \"Question\", \"name\": \"What cleaning products should be used for maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use detergent and fresh water to clean the block and attachments.\"}}, {\"@type\": \"Question\", \"name\": \"How should the block be attached during installation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block, ensuring the lashing goes through both cheeks for secure holding.\"}}, {\"@type\": \"Question\", \"name\": \"Are there important installation cautions for lashing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, lash only through both cheeks so the lashing is holding the block together, not split apart. Incorrect lashing can cause failure.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected for wear or damage during maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops regularly.\"}}, {\"@type\": \"Question\", \"name\": \"Are there precautions when adding an extra block to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Any additional block should not bear more than 1\/3 the load of the upper block. Do not use a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"What feature improves the block's efficiency?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Composite sheaves are insert-molded with low friction ceramic bearings mounted inside caged races.\"}}, {\"@type\": \"Question\", \"name\": \"Can a full-load separate system be used with the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, do not add a fully loaded separate system to the becket block.\"}}, {\"@type\": \"Question\", \"name\": \"What is the construction material of the sheave and sideplates?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They are made from strong and reliable fiber reinforced composite construction.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are used in the core construction of Zircon blocks?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The Zircon block features composite sheaves insert-molded with low friction ceramic bearings and has fiber reinforced composite construction for the sheave and sideplates.\"}}, {\"@type\": \"Question\", \"name\": \"What is the correct method for lashing the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Ensure the lashing goes through both cheeks, not in line with the seam. Lashing along the seam can split the block apart and cause failure.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":53195890655569,"sku":"HKN-1212","price":162.25,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/1e49e1bb-2d48-4546-9f15-098a60a698f1_63da8d5f-e6f6-44be-9b4b-5bb4bba4b334.jpg?v=1772621725"},{"product_id":"harken-57-mm-zircon-triple-block-with-bkt","title":"Harken 57 mm Zircon Triple Block with BKT","description":"\u003c!-- harken-official:v2 Sku:1213 page_sha256:ddb9adc6ada5edfd0413de62ddad0bf5a7f9a7efaeeb643e19c8125a0406092e --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eZircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1350 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2970 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3 3\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e95 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e10 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e450 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e990 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 1\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e57 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e134 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e4.73 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=02cff8711570e7c2de732f6f01fc8739058080c61433f05c2fff2421a3c4208c --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhere can I find additional safety and maintenance information?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eFor additional safety, maintenance, and warranty information, consult the Harken manual or catalog.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block be attached for installation?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block. Ensure the lashing passes through both cheeks to keep the block together.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block be attached for proper installation?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block. Lash only through both cheeks so the lashing holds the block together and not split apart.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there warnings when lashing the block for mounting?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, do not lash in line with the seam as it can split the block. Lashing must go through both cheeks to avoid block failure.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any incorrect mounting methods to avoid?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eAvoid placing the lashing or soft attachment in line with the seam, as it can split the block apart and cause it to fail.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eIs there structural reinforcement in the block for soft attachments?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, there is a structural head provided for soft attachment to ensure secure and reliable mounting.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eCan I add another block to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, the added block's load must not exceed 1\/3 the load of the upper block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any specific warnings about adding blocks to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, the load for the additional block must be no more than 1\/3 the load of the upper block; do not add a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eShould I inspect lashings and attachments over time?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes. Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there specific instructions for cleaning the sheave and bearings?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes. Flush with fresh water while rotating parts to clean sheave, ceramic bearings, and sideplate areas.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should lashings and soft attachments be checked over time?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Where can I find additional safety and maintenance information?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For additional safety, maintenance, and warranty information, consult the Harken manual or catalog.\"}}, {\"@type\": \"Question\", \"name\": \"How should the Zircon block be attached for installation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block. Ensure the lashing passes through both cheeks to keep the block together.\"}}, {\"@type\": \"Question\", \"name\": \"How should the Zircon block be attached for proper installation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block. Lash only through both cheeks so the lashing holds the block together and not split apart.\"}}, {\"@type\": \"Question\", \"name\": \"Are there warnings when lashing the block for mounting?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, do not lash in line with the seam as it can split the block. Lashing must go through both cheeks to avoid block failure.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any incorrect mounting methods to avoid?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Avoid placing the lashing or soft attachment in line with the seam, as it can split the block apart and cause it to fail.\"}}, {\"@type\": \"Question\", \"name\": \"Is there structural reinforcement in the block for soft attachments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, there is a structural head provided for soft attachment to ensure secure and reliable mounting.\"}}, {\"@type\": \"Question\", \"name\": \"Can I add another block to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, the added block's load must not exceed 1\/3 the load of the upper block.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any specific warnings about adding blocks to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, the load for the additional block must be no more than 1\/3 the load of the upper block; do not add a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"Should I inspect lashings and attachments over time?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\"}}, {\"@type\": \"Question\", \"name\": \"Are there specific instructions for cleaning the sheave and bearings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Flush with fresh water while rotating parts to clean sheave, ceramic bearings, and sideplate areas.\"}}, {\"@type\": \"Question\", \"name\": \"How should lashings and soft attachments be checked over time?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":53195890852177,"sku":"HKN-1213","price":218.26,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/1e49e1bb-2d48-4546-9f15-098a60a698f1_a1c0f639-e1b7-4e33-abf5-a13e29167aa7.jpg?v=1772621738"},{"product_id":"harken-29-mm-zircon-block","title":"Harken 29 mm Zircon Block","description":"\u003c!-- harken-official:v2 Sku:2185 page_sha256:b8c0f97208e719fa2e7afdf1a591d2abb3ef2a86a5db01e84cf6a1550e07b254 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe newest Zircon offerings are six models with 29 mm sheave diameters. These expand the Zircon offering from eight models to eighteen. Zircon is not an all-purpose alternative—no block is. But these smaller sizes make Zircon appropriate for control lines where multi-part purchases are required. Zircon reacts immediately. So, when the pressure gets light and you ease that 24:1 Cunningham rigged under the deck or want to let the jib lead forward for some more power through the chop, you will get response.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e240 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e525 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 11\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e43 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e6 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e80 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e175 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 1\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e29 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e10.5 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e0.37 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=68a2d23164e3a2ed9e9cd16aea14ccf20de209c335160b04becc5904a98ad3ff --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there installation precautions for soft attachments?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eAvoid lashing or attaching in line with the seam, which can cause the block to split apart and fail. Lash through both cheeks instead.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat maintenance routine is suggested for the block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean frequently with detergent and fresh water, applying to the sheave, ceramic bearings, and sideplate areas while rotating parts.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is the proper mounting orientation for lashings?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe lashing must go through both block cheeks to maintain structural integrity and prevent the block from being split by force.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eCan an additional block be installed on the becket for increased purchase?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, ensure the load on it is no more than 1\/3 that of the upper block. Do not add a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should I maintain the Harken Zircon Block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean block and attachments frequently with detergent and fresh water. Rotate the sheave during cleaning to distribute and flush.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any safety warnings for load distribution using a becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eNever fully load a separate system from the becket; excess load on the becket block can lead to failure. Follow the 1\/3 load guideline.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat materials are the sheave and sideplates made from?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates use strong and reliable fiber reinforced composite construction for strength and durability.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected regularly for safety?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops to ensure safe operation.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat are the Zircon block sheave and sideplates constructed from?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates are made from fiber reinforced composite, providing strength and reliability for high-performance applications.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any precautions when attaching lashings to the block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eDo not run soft attachments inline with the seam. If the lashing is in line with the seam, it may split the block apart and cause failure.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should you check on lashings and loops during inspection?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect for wear and UV damage, and replace any compromised splices on lashings or attachment loops immediately for safety.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are there installation precautions for soft attachments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Avoid lashing or attaching in line with the seam, which can cause the block to split apart and fail. Lash through both cheeks instead.\"}}, {\"@type\": \"Question\", \"name\": \"What maintenance routine is suggested for the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean frequently with detergent and fresh water, applying to the sheave, ceramic bearings, and sideplate areas while rotating parts.\"}}, {\"@type\": \"Question\", \"name\": \"What is the proper mounting orientation for lashings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The lashing must go through both block cheeks to maintain structural integrity and prevent the block from being split by force.\"}}, {\"@type\": \"Question\", \"name\": \"Can an additional block be installed on the becket for increased purchase?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, ensure the load on it is no more than 1\/3 that of the upper block. Do not add a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"How should I maintain the Harken Zircon Block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean block and attachments frequently with detergent and fresh water. Rotate the sheave during cleaning to distribute and flush.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any safety warnings for load distribution using a becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Never fully load a separate system from the becket; excess load on the becket block can lead to failure. Follow the 1\/3 load guideline.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are the sheave and sideplates made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates use strong and reliable fiber reinforced composite construction for strength and durability.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected regularly for safety?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops to ensure safe operation.\"}}, {\"@type\": \"Question\", \"name\": \"What are the Zircon block sheave and sideplates constructed from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are made from fiber reinforced composite, providing strength and reliability for high-performance applications.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any precautions when attaching lashings to the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not run soft attachments inline with the seam. If the lashing is in line with the seam, it may split the block apart and cause failure.\"}}, {\"@type\": \"Question\", \"name\": \"What should you check on lashings and loops during inspection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect for wear and UV damage, and replace any compromised splices on lashings or attachment loops immediately for safety.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Single","offer_id":53250990047569,"sku":"HKN-2185","price":40.56,"currency_code":"EUR","in_stock":true},{"title":"Double","offer_id":53250990080337,"sku":"HKN-2187","price":71.47,"currency_code":"EUR","in_stock":true},{"title":"Triple","offer_id":53250990113105,"sku":"HKN-2189","price":100.44,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/bcfb2cf2-3f9d-40b9-8d99-eafb7f718d61.jpg?v=1773130204"},{"product_id":"harken-40-mm-zircon-block","title":"Harken 40 mm Zircon Block","description":"\u003c!-- harken-official:v2 Sku:2190 page_sha256:7836fa17c838684fc278301d7a51594c06947a86c47550d44954fb8d634444d0 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eZircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e340 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e750 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 3\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e60 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e5\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e8 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e115 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e250 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 9\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e40 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e22.9 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e0.81 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=ad85bea3e37e59eca325856720eaf3c7018ca5cc001e3a53181e827a2d710487 --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block be cleaned and maintained?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean frequently with detergent and fresh water, direct water into sheave, bearings, and sideplates. Flush while rotating parts.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is an important mounting safety warning for lashings?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eDo not lash in line with the seam, or the block may split apart and fail.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there specific guidelines for using a becket with this block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, ensure the load is no more than 1\/3 of the upper block's load. Do not use a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eCan this block be soft attached and what does that require?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, it has a structural head for soft attachment using lashing through both cheeks.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there precautions if you increase the mechanical advantage using a becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, the load on the added block must not exceed 1\/3 of the upper block's load.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eDoes the block require frequent cleaning?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, frequent cleaning is recommended for optimum performance, especially after exposure to salt water.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any inspection requirements for the attachment loops or lashings?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops regularly.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is a critical warning when adding a block to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eEnsure the load on the block added for mechanical advantage is no more than 1\/3 the load of the upper block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is the block construction material?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates are built from strong, reliable fiber reinforced composite construction.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected regularly on the block’s attachment?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is unique about the block’s bearing system?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIt features composite sheaves insert-molded with low friction ceramic bearings inside caged races.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How should the Zircon block be cleaned and maintained?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean frequently with detergent and fresh water, direct water into sheave, bearings, and sideplates. Flush while rotating parts.\"}}, {\"@type\": \"Question\", \"name\": \"What is an important mounting safety warning for lashings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not lash in line with the seam, or the block may split apart and fail.\"}}, {\"@type\": \"Question\", \"name\": \"Are there specific guidelines for using a becket with this block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, ensure the load is no more than 1\/3 of the upper block's load. Do not use a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"Can this block be soft attached and what does that require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, it has a structural head for soft attachment using lashing through both cheeks.\"}}, {\"@type\": \"Question\", \"name\": \"Are there precautions if you increase the mechanical advantage using a becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the load on the added block must not exceed 1\/3 of the upper block's load.\"}}, {\"@type\": \"Question\", \"name\": \"Does the block require frequent cleaning?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, frequent cleaning is recommended for optimum performance, especially after exposure to salt water.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any inspection requirements for the attachment loops or lashings?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops regularly.\"}}, {\"@type\": \"Question\", \"name\": \"What is a critical warning when adding a block to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Ensure the load on the block added for mechanical advantage is no more than 1\/3 the load of the upper block.\"}}, {\"@type\": \"Question\", \"name\": \"What is the block construction material?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are built from strong, reliable fiber reinforced composite construction.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected regularly on the block’s attachment?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\"}}, {\"@type\": \"Question\", \"name\": \"What is unique about the block’s bearing system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It features composite sheaves insert-molded with low friction ceramic bearings inside caged races.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Single","offer_id":53250990211409,"sku":"HKN-2190","price":57.41,"currency_code":"EUR","in_stock":true},{"title":"Double","offer_id":53250990276945,"sku":"HKN-2192","price":97.01,"currency_code":"EUR","in_stock":true},{"title":"Triple","offer_id":53250990309713,"sku":"HKN-2194","price":146.79,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/940fe560-482e-47d0-88f2-475bb6c6afdb.jpg?v=1773130217"},{"product_id":"harken-40-mm-zircon-block-with-becket","title":"Harken 40 mm Zircon Block with Becket","description":"\u003c!-- harken-official:v2 Sku:2191 page_sha256:dd952e7fc51770dc519298a9ca73c2e590097abe406ee06a9f40d60f44ff2d09 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eZircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e340 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e750 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 7\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e73 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e5\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e8 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e115 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e250 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 9\/16 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e40 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e26.5 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e0.93 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=8467c37daba949915244ffbb5aa78b0fb8727d591891852300cac457762e8a08 --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhere can additional safety and maintenance info be found?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eAdditional safety, maintenance, and warranty information is in the Harken catalog or manuals.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat maintenance does this block require?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean the block and attachments frequently with detergent and fresh water, and rotate the sheave to distribute cleaning.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected during maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should this block be attached for mounting?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block. Lash only through both cheeks so the lashing holds the block together.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should a block be added to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe block added to the becket must have a load no more than 1\/3 of the upper block's load. Do not add a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any limits when adding a block to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe added block’s load must be no more than 1\/3 of the upper block’s load. Do not add a fully loaded separate system.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat material are the sheave and sideplates made from?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates are constructed from strong, reliable fiber reinforced composite material.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any precautions when lashing for attachment?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eEnsure the lashing or soft attachment is not in line with the seam, as this may split the block apart and cause failure.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat type of head attachment does it have?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIt has a structural head for soft attachment.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should soft attachments be fitted to the block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head, ensuring they pass through both cheeks to prevent splitting the block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected on lashings and attachment loops?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect for wear, UV damage, and compromised splices; replace if any of these are found.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Where can additional safety and maintenance info be found?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Additional safety, maintenance, and warranty information is in the Harken catalog or manuals.\"}}, {\"@type\": \"Question\", \"name\": \"What maintenance does this block require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean the block and attachments frequently with detergent and fresh water, and rotate the sheave to distribute cleaning.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected during maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\"}}, {\"@type\": \"Question\", \"name\": \"How should this block be attached for mounting?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block. Lash only through both cheeks so the lashing holds the block together.\"}}, {\"@type\": \"Question\", \"name\": \"How should a block be added to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The block added to the becket must have a load no more than 1\/3 of the upper block's load. Do not add a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any limits when adding a block to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The added block’s load must be no more than 1\/3 of the upper block’s load. Do not add a fully loaded separate system.\"}}, {\"@type\": \"Question\", \"name\": \"What material are the sheave and sideplates made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are constructed from strong, reliable fiber reinforced composite material.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any precautions when lashing for attachment?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Ensure the lashing or soft attachment is not in line with the seam, as this may split the block apart and cause failure.\"}}, {\"@type\": \"Question\", \"name\": \"What type of head attachment does it have?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It has a structural head for soft attachment.\"}}, {\"@type\": \"Question\", \"name\": \"How should soft attachments be fitted to the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head, ensuring they pass through both cheeks to prevent splitting the block.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected on lashings and attachment loops?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect for wear, UV damage, and compromised splices; replace if any of these are found.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Single","offer_id":53250991128913,"sku":"HKN-2191","price":59.39,"currency_code":"EUR","in_stock":true},{"title":"Double","offer_id":53250991161681,"sku":"HKN-2193","price":103.94,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/a87895b2-d8ac-49ba-94f2-a6ee977537fe.jpg?v=1773130249"},{"product_id":"harken-57-mm-zircon-block","title":"Harken 57 mm Zircon Block","description":"\u003c!-- harken-official:v2 Sku:2195 page_sha256:2b636fa400b27bd683cb0ef8104b28218b955f5adf2dd39d5433024faf61ea6a --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eZircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e450 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e990 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3 1\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e79 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e10 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e150 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e330 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 1\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e57 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e44.8 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1.58 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=58cd9ef17ba36963972df25c543aca3d6509415e24f148cdc8701de1408f8f93 --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhere can you find additional safety, maintenance, and warranty info?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eFor more information, refer to the Harken catalog or their manuals section.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected for wear during maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow do you distribute cleaning solution during maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eRotate the sheave to distribute detergent and water through the ceramic bearings and sideplates.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the block be cleaned during maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean frequently with detergent and fresh water applied to the sheave, bearings, and sideplate areas while rotating parts.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any special mounting instructions for blocks with a becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf adding a block to the becket, keep the load on the lower block no more than 1\/3 the load of the upper block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is an important caution when mounting the block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eDo not lash in line with the seam, as this may split the block apart and cause it to fail.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block be attached for mounting?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eAttach the block using lashing or loops secured to the head. Make sure to lash through both cheeks, not in line with the seam.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there load limitations when using additional blocks on the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eYes, the block on the becket used to increase mechanical advantage must bear no more than 1\/3 the load of the upper block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat materials are used in the sheave and sideplates?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe sheave and sideplates are made from strong, reliable fiber reinforced composite construction.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat kind of bearing is used in the Zircon block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eComposite sheaves are insert-molded with low friction ceramic bearings for high performance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat happens if lashings are in line with the seam?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf the lashing or attachment is in line with the seam, it may split the block apart and cause failure. Always lash through both cheeks.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Where can you find additional safety, maintenance, and warranty info?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For more information, refer to the Harken catalog or their manuals section.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected for wear during maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\"}}, {\"@type\": \"Question\", \"name\": \"How do you distribute cleaning solution during maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Rotate the sheave to distribute detergent and water through the ceramic bearings and sideplates.\"}}, {\"@type\": \"Question\", \"name\": \"How should the block be cleaned during maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean frequently with detergent and fresh water applied to the sheave, bearings, and sideplate areas while rotating parts.\"}}, {\"@type\": \"Question\", \"name\": \"Are there any special mounting instructions for blocks with a becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If adding a block to the becket, keep the load on the lower block no more than 1\/3 the load of the upper block.\"}}, {\"@type\": \"Question\", \"name\": \"What is an important caution when mounting the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not lash in line with the seam, as this may split the block apart and cause it to fail.\"}}, {\"@type\": \"Question\", \"name\": \"How should the Zircon block be attached for mounting?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Attach the block using lashing or loops secured to the head. Make sure to lash through both cheeks, not in line with the seam.\"}}, {\"@type\": \"Question\", \"name\": \"Are there load limitations when using additional blocks on the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, the block on the becket used to increase mechanical advantage must bear no more than 1\/3 the load of the upper block.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are used in the sheave and sideplates?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sheave and sideplates are made from strong, reliable fiber reinforced composite construction.\"}}, {\"@type\": \"Question\", \"name\": \"What kind of bearing is used in the Zircon block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Composite sheaves are insert-molded with low friction ceramic bearings for high performance.\"}}, {\"@type\": \"Question\", \"name\": \"What happens if lashings are in line with the seam?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If the lashing or attachment is in line with the seam, it may split the block apart and cause failure. Always lash through both cheeks.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Single","offer_id":53250990801233,"sku":"HKN-2195","price":67.32,"currency_code":"EUR","in_stock":true},{"title":"Double","offer_id":53250990834001,"sku":"HKN-2197","price":132.65,"currency_code":"EUR","in_stock":true},{"title":"Triple","offer_id":53250990899537,"sku":"HKN-2199","price":197.98,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/940fe560-482e-47d0-88f2-475bb6c6afdb_e45f67c3-a7cf-43fe-8038-17cb9a789af7.jpg?v=1773130229"},{"product_id":"harken-57-mm-zircon-block-with-becket","title":"Harken 57 mm Zircon Block with Becket","description":"\u003c!-- harken-official:v2 Sku:2196 page_sha256:8d92d686fbfbddd9712b14e461ba37a4b666f74b09ec20f62249a2eec66c2a51 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eZircon blocks help trimmers match sail shapes to new conditions immediately. At the core of the Zircon performance are industrial ceramic ball bearings mounted inside caged races. The cages keep these bearings separated so they don’t bunch, touch, and stop each other. The result is the most efficient small boat block Harken has ever made. Zircon blocks are available in 40- and 57-mm sheaves in single and double blocks, with or without beckets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e \u003cthead\u003e\u003ctr\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e450 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e990 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3 3\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eLength (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e95 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3\/8 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e10 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e150 kg\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e330 lb\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e2 1\/4 in\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e57 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e51.4 g\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e \u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1.81 oz\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=db174ebfdea102412820a70127e3732f061d0fffd453fa6aceac88406bc5b263 --\u003e\u003cdiv class=\"sr-faq-wrap\" style=\"margin-top:4rem\"\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cdiv class=\"faq-box sr-faq-box\"\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there any general safety, maintenance, or warranty notes provided?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eFor additional safety, maintenance, and warranty information, it is recommended to refer to official manuals or catalogs.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the block be cleaned for maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eClean block and attachments frequently with detergent and fresh water, rotating the sheave to distribute water.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat should be inspected for maintenance?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eInspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eIs there a caution regarding installing a separate system on the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eDo not add a fully loaded separate system to the becket.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the Zircon block with becket be mounted?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block. Lash only through both cheeks so the lashing holds the block together, not split apart.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat is the correct way to add a block to the becket?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThe load on the added block should not exceed 1\/3 the load of the upper block.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat material are the sheave and sideplates made of?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eThey are constructed from strong and reliable fiber reinforced composite material.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should I flush the block during cleaning?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eFlush with fresh water while rotating the parts to distribute, especially through the sheave, bearings, and sideplates.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eHow should the head be attached?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eUse lashing or loops secured to the head of the block for attachment.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eAre there important lashing instructions for the block?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eLash only through both cheeks so the lashing holds the block together, not split apart.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWhat happens if the lashing is in line with the seam?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eIf the lashing or soft attachment is in line with the seam, it can split the block apart and cause it to fail.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv class=\"faq-block\"\u003e\u003cdiv class=\"accordion faq-item\"\u003e\u003cdetails\u003e\u003csummary style=\"align-items:center\"\u003e\u003cspan class=\"faq-block__heading\" style=\"flex:1 1 auto;margin:0;padding-right:2rem;font-size:1.5rem;font-weight:700\"\u003eWho do I contact for help with installation, servicing or advice?\u003c\/span\u003e\u003csvg class=\"icon icon-filter-two\" width=\"12\" height=\"7\" viewbox=\"0 0 12 7\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\"\u003e\u003cpath d=\"M10 1.5L6 5.5L2 1.5\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"square\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"faq-block__description\"\u003e\u003cp\u003eContact \u003ca href=\"https:\/\/www.sailrace.com\/pages\/contact\"\u003ethe SailRACE team\u003c\/a\u003e — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are there any general safety, maintenance, or warranty notes provided?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For additional safety, maintenance, and warranty information, it is recommended to refer to official manuals or catalogs.\"}}, {\"@type\": \"Question\", \"name\": \"How should the block be cleaned for maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean block and attachments frequently with detergent and fresh water, rotating the sheave to distribute water.\"}}, {\"@type\": \"Question\", \"name\": \"What should be inspected for maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Inspect and replace worn, UV damaged, or compromised splices on lashings and attachment loops.\"}}, {\"@type\": \"Question\", \"name\": \"Is there a caution regarding installing a separate system on the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Do not add a fully loaded separate system to the becket.\"}}, {\"@type\": \"Question\", \"name\": \"How should the Zircon block with becket be mounted?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block. Lash only through both cheeks so the lashing holds the block together, not split apart.\"}}, {\"@type\": \"Question\", \"name\": \"What is the correct way to add a block to the becket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The load on the added block should not exceed 1\/3 the load of the upper block.\"}}, {\"@type\": \"Question\", \"name\": \"What material are the sheave and sideplates made of?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They are constructed from strong and reliable fiber reinforced composite material.\"}}, {\"@type\": \"Question\", \"name\": \"How should I flush the block during cleaning?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Flush with fresh water while rotating the parts to distribute, especially through the sheave, bearings, and sideplates.\"}}, {\"@type\": \"Question\", \"name\": \"How should the head be attached?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use lashing or loops secured to the head of the block for attachment.\"}}, {\"@type\": \"Question\", \"name\": \"Are there important lashing instructions for the block?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Lash only through both cheeks so the lashing holds the block together, not split apart.\"}}, {\"@type\": \"Question\", \"name\": \"What happens if the lashing is in line with the seam?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If the lashing or soft attachment is in line with the seam, it can split the block apart and cause it to fail.\"}}, {\"@type\": \"Question\", \"name\": \"Who do I contact for help with installation, servicing or advice?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Contact the SailRACE team — as certified marine experts we're happy to help with product selection, installation and after-sales servicing, before and after your purchase.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Single","offer_id":53250991292753,"sku":"HKN-2196","price":69.29,"currency_code":"EUR","in_stock":true},{"title":"Double","offer_id":53250991325521,"sku":"HKN-2198","price":139.58,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/a87895b2-d8ac-49ba-94f2-a6ee977537fe_a0d74542-ffb3-429b-9d8a-b22be9002f6b.jpg?v=1773130258"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/collections\/Zircon_Blocks.webp?v=1768306290","url":"https:\/\/www.sailrace.com\/pt-br\/collections\/harken-zircon-blocks.oembed","provider":"SailRACE","version":"1.0","type":"link"}