Steel Grade: CK50, CK55, CK60, etc. Measures Thickness: 0.08 millimeters to 3 millimeters. Width measures 8 millimeters to 320 millimeters. The hardness if you want to: Annealing: <20HRC Cold rolled: 21-28HRC Hardened & Tempering: 29-55HRC We have different types of edges as slit edges, both round, a round side, a side opening, square, etc. Surface finishes: polished (blue, yellow, gray, blue, black, bright) or natural, etc. Notes: The customers can request a sample to test the quality of our product.