Marine Boat Yacht Sailboat Dinghy 57mm 2 1/4 Inch Deluxe Cheek Block Master SPB-5709F Master Deluxe blocks are beautifully hybrid with Composite and Stainless Steel to provide lightweight, compact and reliable use. They are available in a wide range of configurations to meet you boat’s needs and are ideal for all applications. Stronger Strength Hybrid with Engineering composite and Stainless Steel, Master Deluxe block is stronger and lighter than classic Stainless Steel blocks. 316 L Stainless Steel Strap reinforces the block and anti-corrosion. Engineering composite sideplates are UV-stabilizer with Anti-UV additives for maximum protection. Low Friction Ball Bearing The exclusive engineering plastic composites ball bearing provides sheave with good rotation and less friction. The 57mm blocks are available in a wide range of configurations. They are lighter, stronger and better than classic Stainless Steel blocks. Specification: Brand: Master Part Number: SPB-5709F Sheave Ø (mm) 57 mm Sheave Ø (in) 2 1/4 in Length (mm) 80mm Length (in) 3 3/20 in Weight (g) 94 g Weight (oz) 3.33 oz Maximum line Ø (mm) 12 mm Maximum line Ø (in) 1/2 in Maximum working load (kg) 250kg Maximum working load (lb) 550lb Breaking load (kg) 1150 kg Breaking load (lb) 2530 lb •Do not use Master products to human suspension! Destination custom duty/tax are not included in the listing price; it is the customer's responsibility to pay for custom duty if any.