HARKEN Premium Sailing 57mm HL Black Magic Air Low Load Boat Block, Part 3226

57mm Aluminum Low Load Black Magic Block with Swivel. Black 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. Low-load blocks have red isolators. They use Torlon rollers and 316 stainless steel shackles. Standard blocks have 17-4 PH stainless head posts. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C. HARKEN Premium Sailing 57mm HL Black Magic Air Low Load Boat Block (Part 3226). Center cage keeps Torlon roller bearings separated and parallel to reduce friction. Air blocks are easy to clean and service — they have few parts and no loose balls or rollers to misplace. Unlike blocks that are riveted, fasteners allow quick disassembly with a single hex wrench. Used for dynamic high load sail controls including mainsheets, runners, halyards and spinnaker systems. These strong, lightweight blocks feature free-rolling, high-load Torlon roller bearings for a high strength-to-weight ratio. Harken 57mm Black Magic single loop block with a removable dead-end post for attachment to a padeye.

• Center cage keeps Torlon roller bearings separated and parallel to reduce friction, while the soft-attachment Loop block has a removable deadend post for attachment to a padeye
• Air blocks are easy to clean and service. They have few parts and no loose balls or rollers to misplace. Unlike blocks that are riveted, fasteners allow quick disassembly with a single hex wrench
• Used for dynamic high load sail controls including mainsheets, runners, halyards and spinnaker systems
• These strong, lightweight blocks feature free-rolling, high-load Torlon roller bearings for a high strength-to-weight ratio
• Harken 57mm Black Magic single loop Block with a removable dead-end post for attachment to a padeye.