Low-friction Carbo AirBlocks® are
lightweight, strong, reliable and affordable. Companions to the popular
Harken® Black Magic® line, these small, compact blocks have very high
working loads for safe, easy trimming.
The compact 29mm Carbo is extremely strong.
Use Harken's miniature Carbo as a mainsheet block on small dinghies such
as the Optimist, or for low-friction control blocks on any size boat.