... ,400kg,450kg castor:Wheel: cast ironFork: high grade cold-roller steel yokeLoading capacity: 300kg,350kg,400kg,450kgWheel diameter: 100mm,125mm,160mm,200mmBearing ... : top plateFeatures:1.caster: rigid caster, swivel caster2.C.I. wheel: excellent anti-abrasion,load capacity and impact resistant ,etc.3 ... .suitable scope: factory,warehouse shelf, heavy-duty appliance, etc. 2010 new heavy-duty castor