Sailboat Dinghy 29mm 1 1/8" Cheek Block Windrider Block Small Boat Block Master BB-0209F 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. Master 29mm block is strong and compact. They are available in a wide range of configurations and ideal for control lines on dinghies to yachts. US, Taiwan, and China Design Patent. Specification: Brand: Master Part Number: BB-0209F Sheave Ø (mm) 29 mm Sheave Ø (in) 1 1/8 in Length (mm) 55 mm Length (in) 2 1/6 in Weight (g) 16 g Weight (oz) 0.56 oz Maximum line Ø (mm) 8 mm Maximum line Ø (in) 5/18 in Maximum working load (kg) 160 kg Maximum working load (lb) 352 lb Breaking load (kg) 500 kg Breaking load (lb) 1100 lb •Do not use Master products to human suspension!