Specification: 1.Thickness: 1.8mm----5.5mm 2.Width:70mm----550mm 3.In diameter:500mm----508mm 4.The thickness tolerance:+/-0.2mm,The width tolerance: +/-0.3mm 5.The edge: Mill Edge or Cut Edge 6.Wrapper of the package: convenience package with Nylon paper and the Snakeskin paper and tight by the steel