Description Antal 50mm OPF Stand-Up Block U-Bolt Technical Description Features Metric American Ø sheave (D) 1.97 in 50 mm Side bearing - Delrin balls Radial bearing - Composite Fibre Weight 0.304 lb 138 g Ø max line 0.39 in 10 mm SWL 1.323 lb 600 kg Material - Aluminum Sheave material - Resin U bolt Mod. - 7105 Ø U bolt base 1.50 in 38 mm