{"product_id":"harken-57mm-black-magic-block-double-swivel-low-load","title":"Harken 57mm Black Magic Block - Double - Swivel - Low-Load","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.\u003c\/p\u003e\r\n\r\n\u003cp\u003eLow-load blocks have red isolators. They use Torlon® rollers and 316 stainless steel shackles. Standard blocks have 17-4 PH stainless headposts.\u003c\/p\u003e\r\n\r\n\u003cp\u003eTorlon is a registered trademark of Solvay Advanced Polymers L.L.C.\u003c\/p\u003e\r\n\r\n\u003ch3\u003e\u003cstrong\u003eTechnical Information:\u003c\/strong\u003e\u003c\/h3\u003e\r\n\r\n\u003cp\u003eSheave: 57 mm (2 1\/4 in)\u003cbr\u003e\r\nLength: 132 mm (5 3\/16 in)\u003cbr\u003e\r\nWeight: 342 g (12.05 oz)\u003cbr\u003e\r\nShackle Pin: 8 mm (5\/16 in)\u003cbr\u003e\r\nMaximum Line: 12 mm (7\/16 in)\u003cbr\u003e\r\nMaximum Working Load: 1250 kg (2755 lb)\u003cbr\u003e\r\nBreaking Load:2500 Kg (5510 lb)\u003c\/p\u003e\r\n","brand":"RIGGINGONLY","offers":[{"title":"Default Title","offer_id":40487082950847,"sku":"HAR3228","price":339.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0584\/7987\/0143\/products\/HAR3228_540x540_9e6115c9-ae55-4ef0-bbd9-ac269fc4623b.jpg?v=1629478606","url":"https:\/\/justrigging.com\/products\/harken-57mm-black-magic-block-double-swivel-low-load","provider":"JUSTRIGGING.COM","version":"1.0","type":"link"}