Iron-core pu caster 8*2 inch 1,swivel top plate ,pu&iron wheel 2,plate Zinc or spray plastics 3,steel ... thickness 5.5mm or 6mm Iron core pu caster 8*2 inch ... with brake1,swivel top plate ,pu&iron wheel2,plate Zinc or spray plastics3,steel ... x 50, 150 x 50, 200 x 50mm 8 inch Iron-core pu caster with brake