HARKEN 22mm Triple Micro Block, 228 Item Type_Blocks It is perfect for small

It is perfect for small synthetic control lines found on high-tech dinghies

Lightweight Carbo Ratchets are available in 40mm

Ball bearing swivel bases feature dual rows of Delrin® ball bearings that swivel freely even under high loads

and 75mm sizes

So size for size

HARKEN 22mm Triple Micro Block, 228 Item Type_Blocks It is perfect for smallHarken 22mm Triple Micro Block handles loads to 500 pounds. Micro Low friction extremely lightweight, free running blocks are compact. Designed for any number of uses on dinghies and for lightly loaded control lines on boats of all sizes. Derlin ball bearings are UV stabilized with carbon black for maximum protection and stainless steel side plates add strength. Use inside masts, booms, lead car returns and tackle.