Description S.steel mini blocks, single web block with becket, sheave Ø 34, SWL 400 kg Manufacturer part #:00321 Technical Description Features American Metric Ø sheave (D) 1.34 in 34 mm Side bearing Delrin balls Delrin balls Weight 0.095 lbs 43 gr Ø max line 0.24 in 6 mm SWL 881.8 lbs 400 kg Material S.steel S.steel Sheave material Plastic Plastic