With brushed stainless steel balls, cutting, rounding and other refining process. Stainless steel balls look bright, no rust, bead-like (cutting pills, cylindrical). Widely applied to the surface of the workpiece copper, aluminum, zinc, stainless steel blast processing, stainless steel balls for the workpiece after having matte effect, highlighting the qualities of metal, rust, etc., without the need for pickling rust treatment and wear degree is 3-5 times cast stainless steel balls can reduce production costs. Main Specifications: Stainless steel cutting pills -0.2mm-- Abrasive Co., Ltd. Taizhou Sheng public ≤0.12% carbon silicon manganese ≤2.00% ≤1.00% P ≤0.035% sulfur ≤0.03% chromium nickel 7-10% 17-19% density : 7.39g / cm3 Hardness: 50-60HRC official website: http: //www.jygangwan.com http://www.jymsh.com