-we can supply Ceramic balls Here are brief introduction of our company: Nasch is one of the world's leading advanced ceramic materials companies in the design, manufacture and marketing of high-tech ceramic. These are used in a wide range of applications in Electricity, information, power, automobile, petrol. We have four divisions: high temperature ceramic division, optical precision ceramic division, sensitive precision ceramic division and structure ceramic divisio Ceramic ball bearings with high sthrength ,high hardness,high elastic modulus,wear resistance,corrosion resistance and other media corrosion ,oxidation resistance. Si3N4 ceramic ball bearing material density ≥3.rd20g/cm3 microhardness 1500-1700kg/mm