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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: Feature red isolators, Torlon rollers, and 316 stainless steel shackles.
Standard blocks: Equipped with 17-4 PH stainless headposts.
Specifications
• Brand: Harken
• Reference: 3228
• Sheave Ø: 57 mm
• Length: 132 mm
• Weight: 342 g
• Shackle pin Ø: 8 mm
• Maximum line Ø: 12 mm
• Maximum working load: 1250 kg
• Breaking load: 2500 kg






