Optiparts - Pennant Holders for Optimist mast hooks The patented bearing system uses

The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) safe working load - the highest on the market compared to similarly sized blocks

Description: Single/swivel

Shackle pin diameter: 4mm

Sheave Ø (mm) - 40 mm

Sheaves spin on high-load ball bearings with fitted races for low-friction operation

Optiparts - Pennant Holders for Optimist mast hooks The patented bearing system usesOptiparts top pins for Optimist mast, which do not cut the lines, as supplied with racing masts. Set of 2. A pair of pennant holders designed for securing the top of the sail and holding your burgee or wind indicator in place. Ref: 1338