... materials : PVC or PU Fittings : Rigid,swive,screw stem,dual brake,plastic brake. Wheel bearings : Double bearing Load capacity : 80kg,90kg,100kg ... caster, Heavy duty casters, PU caster,PP Caster,PVC Caster,Rubber caster, Swivel caster,Cart caster,Pallet trolley caster, TPR caster ...