Stainless steel 440C or Cronidur X30 ballbearings are mostly suitable for applications that require hardness, dimensional stability, corrosion resistance and toughness. Stainless Steel 440C is resistant to corrosion from fresh water, steam, crude oil, gasoline, perspiration, alcohol, blood and food stuffs. Size range from ID6-159mm all can be customized, stainless steel race with ceramic balls.