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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.
Bearing Design
• Center Cage: A center cage keeps Torlon roller bearings separated and parallel to reduce friction.
• Load Distribution: The sheave center carries primary load, allowing a smaller, lighter weight block.
Attachment Options
• Loop Block: The soft-attachment Loop block has a removable deadend post for attachment to a padeye.
• Lashings: Lashings can also be used.
Specifications
• Brand: Harken
• Reference: 3389
• Sheave Ø: 45 mm
• Length: 63 mm
• Weight: 57 g
• Maximum line Ø: 10 mm
• Maximum working load: 750 kg
• Breaking load: 1500 kg
