{"product_id":"harken-45mm-aluminum-black-magic-air-block-w-swivel","title":"Harken 45mm Aluminum Black Magic Air Block w\/Swivel","description":"\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e45mm Aluminum Black Magic Air Block with Swivel\u003c\/strong\u003e\u003c\/p\u003e\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 the line from twisting. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e\u003cli\u003eSheave  (mm): 45 mm\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eSheave  (in): 1-3\/4 in\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eLength (mm): 100 mm\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eLength (in): 3-15\/16 in\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eWeight (g): 79 g\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eWeight (oz): 2.79 oz\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eShackle pin  (mm): 5 mm\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eShackle pin  (in): 3\/16 in\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eMaximum line  (mm): 10 mm\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eMaximum line  (in): 3\/8 in\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eMaximum working load (kg): 750 kg\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eMaximum working load (lb): 1653 lb\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eBreaking load (kg): 1500 kg\u003c\/li\u003e\n\u003cbr\u003e\u003cli\u003eBreaking load (lb): 3306 lb\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e ","brand":"Harken","offers":[{"title":"Default Title","offer_id":51761998627136,"sku":"103512","price":211.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/4529\/4144\/files\/103512XL.jpg?v=1775928381","url":"https:\/\/boatgearusa.com\/products\/harken-45mm-aluminum-black-magic-air-block-w-swivel","provider":"Boat Gear USA","version":"1.0","type":"link"}