Harken 40mm Carbo Blocks

These smooth-running powerful performers make trimming easy, no matter how hard the wind blows. Carbo Air blocks are made of tough reinforced composite in a size and style to fit any system: singles, doubles, triples, quads; ratchets and fiddles; soft and hard attach. Perfect for main, jib and spinnaker sheets on dinghies and sportboats; control lines on boats of all sizes.

Lightweight, strong and reliable fiber-reinforced composite construction.

Ball bearings, sheave, and sideplates are UV-stabilized.

Low-friction Carbo Air blocks are lightweight, strong, reliable – and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.