Harken 57mm Aluminium Low-Load Double Block - 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 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 headposts. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C
| Part Number | Sheave Dia. | Length | Weight | Shackle Pin Dia. | Max. Line Dia. | Max. Working Load | Breaking Load |
|---|---|---|---|---|---|---|---|
| HKN-3228 | 57mm | 132mm | 342g | 8mm | 12mm | 1250kg | 2500kg |
