Carbo AirBlocks are 60% stronger and
30% lighter than the classic Harken block. 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 UV stabilized with black additive for maximum protection.
The 75mm Carbo has a safe working load of
1200lbs (500kg). It releases easily under load.