Description Antal Shackle Block D40 Single Bush Head Stainless Steel Mini blocks, single block sheave Ø40 Technical Description Features Metric American sheave (D) 1.57 in 40 mm SWL 1102.31 lb 500 kg max line 0.31 in 8 mm Side bearing - Delrin balls Sheave material - Resin Material - Stainless Steel Weight 0.14 lb 62 g