1.size 4~8inch 2.Material: PU, rubber ,nylon,iron 3.Type:fixed,Swivel,with brake 4.Timely shipment 5.OEM acceptable Heavy duty caster wheelsType:fixed,Swivel,with brakeSurface finish:Plate Zinc,Spray plasticSteel thickness:6mm MeterialSize(mm)Load height(mm)BearingLoading capacity(Kg) Rubber100*50137 Roller230125*50158250150*50186280200*50230320 PU100*50137250125*50158280150*50186300200*50230350 ...