Schaefer Sheave, 2 3/8"(60mm) OD, Aluminum, Wire Hayn Aircraft Eyes It is compatible with many

It is compatible with many surfaces and will not harm most glass

They install permanently on the boom and allow you to instantly attach and adjust your sail in high wind and waves

flyscreens operate effortlessly

Manufacturer part #: RA2058014200

Sheave Ø (mm) 76 mm Sheave Ø (in) 3 in Length (mm) 197 mm Length (in) 7 3/4 in Weight (g) 1389 g Weight (oz) 49 oz Maximum line Ø (mm) 14 mm Maximum line Ø (in) 9/16 in Shackle pin Ø (mm) 8 mm Shackle pin Ø (in) 5/16 in Maximum working load (kg) 1724 kg Maximum working load (lb) 3800 lb Breaking load (kg) 3856 kg Breaking load (lb) 8500 lb Turns Clockwise

Schaefer Sheave, 2 3/8"(60mm) OD, Aluminum, Wire Hayn Aircraft Eyes It is compatible with manyProduct Description Features TABS >Manufacturer part #: 62 228 BW Features American Metric Description Aluminum Sheave Max Wire 1 8 in 3 mm Outside 2 3 8 in 60 mm Inside 7 16 in 11 mm Width 13 32 in 10 mm TABS > Manufacturer part #: 62 228 BW Schaefer Blocks rely on a variety of sheave designs, materials and scorings. Schaefer sheaves are designed to be compatible with Schaefer products, and are not intended for use in other manufacturers blocks.