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.