LUOYANG YUSION INDUSTRIAL CO.,LTD. is a professional AISI 52100 Chrome Steel Balls & AISI S-2 Rockbit Balls manufacturer in China.The balls we can produced are ranging from 3/16‘’to 150mm.The grade of our products ranges from G10 to G200,Website:http://www.ys-steelball.com,which conform to ASTM/AISI and international standard like ISO,JIS&DIN. We can also manufacture steel balls have passed ISO 9001;2000,SGS and D&B quality system certification.