Iron-core pu caster 8*2 inch 1,swivel top plate ,pu&iron wheel 2, ... ,steel thickness 5.5mm or 6mm Iron core pu caster 8*2 inch with brake1,swivel top plate ,pu&iron wheel2 ... , rigid, swivel with brake3) Size: 100 x 50, 125 x 50, 150 x 50, 200 x 50mm 8 inch Iron-core pu caster with brake