ceramic ball bearings Features:1,ABEC7 2,High speed 3,End cover:ZZ ... C0,C3... Lily bearing is a specialized manufacturer of ceramic ball bearings. We have 2 types of ceramic bearing, hybrid ceramic bearing ... zirconia or zirconium oxide, they are white colored, a ZrO2 ball looks exactly like a pearl. the ceramic material is not ... generated. full ceramic Si3N4 ZrO2 Full Complement Thrust hybrid bearings