Ceramic Ball Bearings Ceramic Ball:Si3N4,Zro2,Sic,AI203 Ceramic Ball Bearings Features and specification of XBL bearingRing MaterialGCr15, GCr15SiMn, Bearing steelCagesteel cageQuality standardISO9001:2000PrecisionP0, P3,P4, ... , low noise and high speed electric motor automotive components, pumps, machinery. SalesAmy Matelephone number0086-15957493720Fax.0086-574-63046362 Ceramic Ball Bearings