Sailboat Dinghy 57mm 2 1/4 Inch Poviting Lead Fairlead AL Cleat Block Small Boat Block Master FF-0501F Master Small Boat Poviting Lead Block is made of CNC machined Black Hardcoat-Anodized Aluminum alloy cheeks to provide excellent strength and lightweight. Derlin shaves with UV protection run on self-lubricant ball bearing system for fast trim and release. These Poviting Lead blocks can be applied in various leads such as halyard leads, mainsheet leads, and spinnaker sheet leads. Specification: Brand: Master Part Number: FF-0501F Sheave Ø (mm) 57 mm Sheave Ø (in) 2 1/4 in Length (mm) 78mm Length (in) 4 in Weight (g) 150 g Weight (oz) 5.29 oz Maximum line Ø (mm) 10 mm Maximum line Ø (in) 3/8 in Maximum working load (kg)1200 kg Maximum working load (lb) 2640 lb Breaking load (kg) 2500 kg Breaking load (lb) 5500 lb •Do not use Master products to human suspension!