Sailboat Dinghy 29mm 1 1/8 Inch Deluxe Single Block Small Boat Block Master SPB-2911F 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. Master Delux 29mm block is strong and compact. They are available in a wide range of configurations and ideal for control lines on dinghies to yachts. Specification: Brand: Master Part Number: SPB-2911F Sheave Ø (mm) 29 mm Sheave Ø (in) 11/8 in Length (mm) 51 mm Length (in) 2 in Weight (g) 38 g Weight (oz) 1.32 oz Maximum line Ø (mm) 8 mm Maximum line Ø (in) 5/16 in Maximum working load (kg) 180 kg Maximum working load (lb) 396 lb Breaking load (kg) 900 kg Breaking load (lb) 1984 lb