Harken Black Magic Block with Swivel - 75 mm (2 15/16") - 3231

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.

Specifications:

• Sheave Diameter: 75 mm (2 15/16")
• Length: 129 mm (5 1/8")
• Weight: 331 g (11.68 oz)
• Shackle Pin Diameter: 8 mm (5/16")
• Maximum Line Diameter: 14 mm (9/16")
• Maximum Working Load: 2268 kg (5000 lbs)
• Breaking Load: 4536 kg (10000 lbs)

Owner's Manual (4.80 MB)