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Harken Carbo Blocks
Harken Carbo AirBlocks are 60% stronger and 30% lighter than the Classic Blocks. The Harken 75 mm Carbo Block has a safe working load of 1200 lbs (500 kg). It releases easily under load and is perfect for mainsheet systems on sport boats like the Melges 24, J/105, and Henderson 30.
The nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.