Description Antal 60mm OPF Halyard Block Up-Down Technical Description Features Metric American Length (L) 4.06 in 103 mm Width (W) 0.98 in 25 mm Height (H) 2.87 in 73 mm Ø Sheave (D) 2.36 in 60 mm Weight 0.33 lb 150 g Ø max line 0.47 in 12 mm A 0.51 in 13 mm SWL 1764 lb 800 kg Side bearing - Delrin balls Material - Aluminum Sheave material - Resin Fixing screws 0.08 × 0.24 in 2 × Ø6 mm