Base plate: cold-rolled plate, hot-rolled plates Zinc coating thickness: 60-275g / m2, Al-Zn: 60-180g / m2. Plate thickness: 0.1-3.0mm Width: 20mm---1550mm Light volume inside diameter: did you 508mm, 610mm Quality standards: EN10142, EN10326, EN10169, JIS3302, ASTMA755M, GB / T12754 Steel number: DX51D, DX52D, DX53D, S220GD, S250GD, SGCC Surface structure: the normal zinc flower, small zinc flower, finishing surface, zero zinc flower Surface treatment: chromate passivation Exported standard packing: Inside anti-rust paper + Inside iron guard board + anti-rust paper +Peripheral antirust board + Circle iron guard board +4*4 strapping