Steel balls. Stainless steel ball. chrome steel ball. carbon steel ... .8mm.Top qua 1.Diameter: 0.7mm-50.8mm 2.Grade: G10-G1000 3.HRC: 60-66 4. ... The quality of our steel balls confirms to standards of GB/T308-2002, ISO 3290 ... 5401:2002-08, JIS B 1501.With reputed steel balls and ball retainers, together with our value-added service, ... , Russia, Turkey, Germany, Mexico and so on. Steel balls