Description Antal OPF Block D100 Single + Long Head D10 L25 OPF series, single block sheave Ø100 Technical Description Features American Metric Ø sheave (D) 3.94 in 100 mm SWL 7716.18 lb 3500 kg Ø max line 0.63 in 16 mm Shackle Mod. - 010HR Side bearing - Delrin balls Sheave material - Resin Radial bearing - Composite Fibre Material - Aluminum Weight 1.65 lb 750 g