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1. The hardness is 45-52 HRC depend on user demand
2. Finish: Blue,Bright, gray, etc
3. Edge: One or both edges round square chamfered and beveled
4. Bright polished cold rolled steel strip
5. Tolerance of thickness: +/-0.01mm, width: +/-0.1mm
6.Packing each bundle with anti-rust paper and light oil then wrapped in plastic film