Description Antal 50mm OPF Double Block OPF series, double block, sheave Ø50, SWL 800 kg Technical Description Features Metric American Ø sheave (D) 1.97 in 50 mm Side bearing - Delrin balls Radial bearing - Composite Fibre Weight 0.381 lb 173 gr Ø max line 0.39 in 10 mm SWL 1.764 lb 800 kg Material - Aluminum Sheave material - Resin Shackle Mod. - 006SS