Detailed Product Description stainless steel ball1.material: 316L ,316,304,440c,304hc,420,430 2.diamter: 0.8-60.mm, 3.grade:g10-g10004.production standard:GB308-89 ISO 3290usually for specific industries such as medical equipment, chemicals, aviation, space flight: perfume bottles, sprayers, valves, nail polish, body jewelry, cell phone panels etc.