Low-friction 22 mm Micro Blocks from Harken are compact and lightweight. They are ideal for small dinghies and sailboats, and lightly loaded control lines on larger boats. The Micro Block sheaves run exclusively on ball bearing system for fast trimming and release under any load. Derlin ball bearings are UV stabilized with carbon black for maximum protection and stainless steel sideplates add strength. Recommended for use in cunningham and outhaul assemblies, vangs, traveler controls, barberhaulers, flag halyards, leech cords, and lead car return tackles on larger boats. Available in multiple configurations from the popular H224 single block to the H231 triple block with cleat and everything in between. This is our best selling block range.