Detailed Product Description 1)Thickness: 0.25 - 2.5mm 2)Thickness tolerance: +/-0.03mm 3)Width: As customer demand within 500mm 4)Internal Diameter: 500mm/508mm 5)Surface Spangle: Regular spangle, minimal spangle, or by order of client 6)Zinc Coating: Z12 or as customer demand 7)Product Standard: GB/T2518-2004 EN10143 ASTM A653 JIS SGCC 8)Quality:q195 DX51D+Z CQ OR LFQ G3302 E