Harken's Carbo AirBlocks® are 60% stronger and 30% lighter than Classic blocks. The nylon-resin sideplates are densely packed with long glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation. Ball bearings, sheave, and sideplates are UV-stablized for maximum protection.
The high-load 75mm Carbo releases easily under load and is perfect for mainsheet systems on sport boats like the Melges 24, J/105, or Henderson 30. Other uses include mainsheet fine-tune, control lines, vangs, cunninghams, and outhauls.
Swivel blocks can lock in two directions or spin freely to avoid lines twisting.
|Sheave Diameter||2 5/16 in||75 mm|
|Max Line Diameter||9/16 in||14 mm|
|Max Working Load||3,639 lb||1,650 kg|
|Breaking Load||10,000 lb||4,535 kg|
|Shackle Pin Diameter||5/16 in||8 mm|
|Weight w/ Shackle||21.1 oz||599 g|
|Length||7 in||178 mm|