{"product_id":"57mm-black-magic-aluminum-block","title":"57MM SINGLE BLACK MAGIC AIR ALUMINUM BLOCK W\/SWIVEL","description":"\u003ch2 data-start=\"0\" data-end=\"53\"\u003eHarken 57mm Black Magic Aluminum Block with Swivel\u003c\/h2\u003e\n\u003cp data-start=\"55\" data-end=\"403\"\u003eThe \u003cstrong data-start=\"59\" data-end=\"113\"\u003eHarken 57mm Black Magic Aluminum Block with Swivel\u003c\/strong\u003e is a high-load, smooth-running pulley built for demanding rigging applications where strength and low-friction performance matter. With a 57mm aluminum sheave, this block offers a major step up in load capacity compared to lighter Carbo-style blocks, while still keeping a compact profile.\u003c\/p\u003e\n\u003cp data-start=\"405\" data-end=\"719\"\u003eThe swivel head helps the block align naturally under load, reducing line twist and keeping your rigging running clean. It’s a strong option for heavier outrigger rigging, dredge pulley setups, teaser systems, halyard-style applications, and custom marine rigging where durability and smooth line movement are key.\u003c\/p\u003e\n\u003ch3 data-start=\"721\" data-end=\"737\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"739\" data-end=\"1151\"\u003e\n\u003cli data-start=\"739\" data-end=\"775\"\u003eSingle 57mm aluminum sheave design\u003c\/li\u003e\n\u003cli data-start=\"776\" data-end=\"816\"\u003eSwivel head for cleaner line alignment\u003c\/li\u003e\n\u003cli data-start=\"817\" data-end=\"852\"\u003eBlack Magic aluminum construction\u003c\/li\u003e\n\u003cli data-start=\"853\" data-end=\"906\"\u003eHigh-load design for demanding rigging applications\u003c\/li\u003e\n\u003cli data-start=\"907\" data-end=\"938\"\u003eSmooth-running bearing system\u003c\/li\u003e\n\u003cli data-start=\"939\" data-end=\"975\"\u003eCompact size with serious strength\u003c\/li\u003e\n\u003cli data-start=\"976\" data-end=\"1005\"\u003eWorks with line up to 7\/16\"\u003c\/li\u003e\n\u003cli data-start=\"1006\" data-end=\"1114\"\u003eGreat for custom rigging, dredge setups, teaser systems, outrigger rigging, and marine tackle applications\u003c\/li\u003e\n\u003cli data-start=\"1115\" data-end=\"1151\"\u003eManufacturer part number: \u003cstrong data-start=\"1143\" data-end=\"1151\"\u003e3215\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1153\" data-end=\"1162\"\u003eSpecs\u003c\/h3\u003e\n\u003cul data-start=\"1164\" data-end=\"1402\"\u003e\n\u003cli data-start=\"1164\" data-end=\"1191\"\u003e\n\u003cstrong data-start=\"1166\" data-end=\"1177\"\u003eSheave:\u003c\/strong\u003e 57mm \/ 2-1\/4\"\u003c\/li\u003e\n\u003cli data-start=\"1192\" data-end=\"1222\"\u003e\n\u003cstrong data-start=\"1194\" data-end=\"1205\"\u003eLength:\u003c\/strong\u003e 119mm \/ 4-11\/16\"\u003c\/li\u003e\n\u003cli data-start=\"1223\" data-end=\"1251\"\u003e\n\u003cstrong data-start=\"1225\" data-end=\"1236\"\u003eWeight:\u003c\/strong\u003e 5.36 oz \/ 152g\u003c\/li\u003e\n\u003cli data-start=\"1252\" data-end=\"1281\"\u003e\n\u003cstrong data-start=\"1254\" data-end=\"1270\"\u003eShackle Pin:\u003c\/strong\u003e 1\/4\" \/ 6mm\u003c\/li\u003e\n\u003cli data-start=\"1282\" data-end=\"1319\"\u003e\n\u003cstrong data-start=\"1284\" data-end=\"1306\"\u003eMax Line Diameter:\u003c\/strong\u003e 7\/16\" \/ 12mm\u003c\/li\u003e\n\u003cli data-start=\"1320\" data-end=\"1362\"\u003e\n\u003cstrong data-start=\"1322\" data-end=\"1343\"\u003eMax Working Load:\u003c\/strong\u003e 2,500 lb \/ 1,134kg\u003c\/li\u003e\n\u003cli data-start=\"1363\" data-end=\"1402\"\u003e\n\u003cstrong data-start=\"1365\" data-end=\"1383\"\u003eBreaking Load:\u003c\/strong\u003e 5,000 lb \/ 2,268kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1404\" data-end=\"1695\"\u003eThe Harken 57mm Black Magic Aluminum Block is a heavy-duty choice for crews who need compact size, smooth operation, and serious load capacity in one clean rigging package.\u003c\/p\u003e","brand":"HARKEN","offers":[{"title":"Default Title","offer_id":51653392990498,"sku":"21521","price":261.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0945\/1477\/4306\/files\/product_0621b45a-085d-46de-af61-7baec5e0fcef.jpg?v=1779301126","url":"https:\/\/whitestackle.com\/products\/57mm-black-magic-aluminum-block","provider":"WHITE'S TACKLE ","version":"1.0","type":"link"}