HARKEN Black Magic Air Block | Premium Sailing and Sailboat Equipment

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 Ø (mm): 75 mm - Sheave Ø (in): 2 15/16 in - Length (mm): 129 mm - Length (in): 5 1/8 in - Weight (g): 331 g - Weight (oz): 11.68 oz - Shackle pin Ø (mm): 8 mm - Shackle pin Ø (in): 5/16 in - Maximum line Ø (mm): 14 mm - Maximum line Ø (in): 9/15 in - Maximum working load (kg): 2268 kg - Maximum working load (lb): 5000 lb - Breaking load (kg): 4536 kg - Breaking load (lb): 10000 lb

• Lightweight blocks with high-load Torlon roller bearings for a high strength-to-weight ratio Ideal for sail controls including mainsheet, runner, halyard, and spinnaker systems Center cage keeps Torlon roller bearings separated and parallel to reduce friction
• Sheaves have radiused edges to protect today’s high-tech line Stainless steel swivel shackle Blocks are easily disassembled with a single Allen wrench
• Sheave Diameter: 2 15/16" (75 mm) Max. Line Diameter: 9/16" (14 mm)
• Max. Working Load (MWL): 5000 lb. (2268 kg) Breaking Load: 10000 lb (4536 kg)
• Weight: 11.68 oz. (331 g) Length: 5 1/8" (129 mm)