{"product_id":"harken-black-magic-air-57-mm-aluminum-block-swivel","title":"Harken Black Magic Air 57 mm Aluminum Block — Swivel","description":"\u003cp\u003eBlack Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C. \u003c\/p\u003e \u003cdiv id=\"gap-943546600\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\"\u003e \u003c\/div\u003e \u003cdiv class=\"container section-title-container\"\u003e \u003ch3 class=\"section-title section-title-center\"\u003e \u003cb aria-hidden=\"true\"\u003e\u003c\/b\u003e\u003cspan class=\"section-title-main\"\u003eProduct Specifications\u003c\/span\u003e\u003cb aria-hidden=\"true\"\u003e\u003c\/b\u003e \u003c\/h3\u003e \u003c\/div\u003e \u003cp\u003eSheave Ø (mm) 57 mm\u003cbr\u003e Sheave Ø (in) 2 1\/4 in\u003cbr\u003e Length (mm) 119 mm\u003cbr\u003e Length (in) 4 11\/16 in\u003cbr\u003e Weight (g) 152 g\u003cbr\u003e Weight (oz) 5.36 oz\u003cbr\u003e Shackle pin Ø (mm) 6 mm\u003cbr\u003e Shackle pin Ø (in) 1\/4 in\u003cbr\u003e Maximum line Ø (mm) 12 mm\u003cbr\u003e Maximum line Ø (in) 7\/16 in\u003cbr\u003e Maximum working load (kg) 1134 kg\u003cbr\u003e Maximum working load (lb) 2500 lb\u003cbr\u003e Breaking load (kg) 2268 kg\u003cbr\u003e Breaking load (lb) 5000 lb\u003c\/p\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":51625582002513,"sku":"HKN-3215","price":345.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/www.sailrace.com-harken-57mm-aluminum-block-swivel.jpg?v=1754725159","url":"https:\/\/www.sailrace.com\/es-us\/products\/harken-black-magic-air-57-mm-aluminum-block-swivel","provider":"SailRACE","version":"1.0","type":"link"}