Mast Block, generally used on a vessel 33-40ft depending on the rig, Clevis pin diameter 6mm, Torlon ball bearings, Sheave Diameter 63mm, takes line up to 13mm, ID collar shackle width 16.5mm, Overall collar shackle length 31mm We can supply the heavy duty springs if required $8.00 including GST each

Product unit weight grams:313g