Base plate: hot galvanized steel coil, galvanized steel coil Zinc coating thickness: galvanized layer: 60-275g / m2, aluminium zinc layer: 60-180g / m2. The thickness of the substrate: 0.13-2.0mm Width: 20 ~ 1250mm Inner diameter: did you 508mm, 610mm Quality standards: EN10142, EN10326, EN10169, JIS3302, ASTMA755M, GB / T12754 Steel number: DX51D, DX52D, DX53D, S220GD, S250GD, SGCC Paint type: polyester ( PE ), polyvinylidene fluoride Exported standard packing: Inside anti-rust paper + Inside iron guard board + anti-rust paper +Peripheral antirust board + Circle iron guard board +4*4 strapping