... spray plastics 3,steel thickness 5.5mm or 6mm Iron core pu caster 10*2 inch 1,swivel top ... plate ,pu&iron wheel2,plate Zinc or spray plastics3,steel thickness 5.5mm ... or 6mmFeatures:1) Heavy duty industrial caster with cast iron molded PU wheel2) Swivel, rigid, swivel with brake3) Size ... 100 x 50, 125 x 50, 150 x 50, 200 x 50,250*50,300*50mm 10 inch Iron-core pu caster