Steel balls classified into low carbon steel balls, high carbon steel balls, high carbon chrome steel balls, stainless steel balls, and common materials for steel ball production are Q195, Q215, Q235, Q275, AISI 1010, AISI 1015, AISI 1018, AISI 1045, AISI 1065, AISI 1085, GCr15, SUJ2, AISI 52100, 100Cr6, SWRCH22A, 201, 302, 304, 316, 316L, 420, 440C. Sizes 1.588mm - 38.1mm, G10 - G1000, contact me if you need, my Phone No. and WhatsApp No. is +8618616693199, Lskdbearings@163.com