1,This block wheel is made from MC nylon. 2,High quality 3,23 years experience Specification For Block Wheel---MC Nylon Product no.TypeOutside dia Φ1 mmBottom diameter Φ2(mm)Semidaimeter Rg (mm)Thickness H (mm)Mouth width B (mm) Rated lode(KN) Weight(kgMaterial040101HLN160×50160108165042101.2MC Nylon040102HLN1200×50200140165040151.5040103HLN250×60250180206046202040104HLN300×75300220267559202. ...