... Wheel diameter :40mm, 50mm Wheel materials : PVC or PU Fittings : swivel with brake Wheel bearings : Double bearing Load capacity : 40kg,50kg Housing ... 50 25 70 X 51 53 X 35 74 50 Rolling castor wheel, light duty casters, Medium duty casters, medium heavy ... duty casters, PU caster,PP Caster,PVC Caster,Rubber caster, Swivel caster,Cart caster,Pallet trolley caster, TPR caster,Cast Iron ...