... diameter: 508mm--610mmSurface Treatment: coatedCertification: ISO9001Weight of coil: 3--8 tonsPackage Method: Vertical, horizontalPainting ... fastness, good rain proofness, good corrosion resistance, simple installation, lower time-consumption, low construction cost ... , staircase and ventilating duct.Appliance: Refrigherator, washing machine, switch cabinet, appearance, cabinet, air conditioner, ...