Sailboat Dinghy 22mm 7/8" Cheek Block Windrider Block Master BB-2209F Master Windrider blocks are engineered for competitive sailing. The high strength composite sideplates are to provide top performance of working loads. The excellent weather-ability protects blocks from breaking down for any sailing conditions. Available in comprehensive range of sizes for different rope diameters and configurations. Master blocks are beautiful in design, but simple in use. Ultra Lightweight Master set a new standard of lightweight to blocks. With extremely lightweight, Master block are the best choice for racers. Stronger Strength Engineering composite is stronger and lighter than classic stainless steel blocks. Low Friction Ball Bearing The exclusive engineering plastic composites ball bearing provides sheave with good rotation and less friction. 22mm blocks are specially designed for sailboards, dinghies, and control lines of all different configurations. US, Taiwan, and China Design Patent. Specification: Brand: Master Part Number: BB-2209F Sheave Ø (mm) 22 mm Sheave Ø (in) 7/8 in Length (mm) 42 mm Length (in) 1 2/3 in Weight (g) 9.2 g Weight (oz) 0.32 oz Maximum line Ø (mm) 6 mm Maximum line Ø (in) 1/4 in Maximum working load (kg) 100 kg Maximum working load (lb) 220 lb Breaking load (kg) 390 kg Breaking load (lb) 858 lb •Do not use Master products to human suspension!