HARKEN 22 mm Shackle Micro Block, 234 Block Size_57 mm They are offered in singles

They are offered in singles

such as travelers

Delrin® ball bearings are UV-stabilized with carbon black for maximum protection

Other features include an adjustable back support

Commonly 57mm fiddle blocks are for jibsheets and vangs on small dinghies

HARKEN 22 mm Shackle Micro Block, 234 Block Size_57 mm They are offered in singlesLow friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. Micro block sheaves run exclusively on ball bearing systems for fast trim and release under any load. Delrin ball bearings are UV stabilized with carbon black for maximum protection. Stainless steel sideplates add strength.