... wheel 2012 Heavy duty double ball bearing side brake pu caster wheel Heavy Duty Caster /Four Size available (4'',5'',6'',8'')[Model ... *50mm,200mm*50mm2.Load capacity: from 2350kg to 370kg 3. .Caster material: PU wheel tyre with pp (nylon) core .this wheel core ... and Black Electrophoresis finishing available 6.Caster wheel can be changed to Pvc,rubber ,nylon ,pp ,tpr ,cast iron,high-heat resistant ...