... .resistance to strong... Model Number: Si3n4 6806CE Si3n4 Hybrid Ceramic Ball Bearings (6806CE)Sale model:We can accept the wholesale, small moq ... for further cooperation. 1: We have 2 types of Ceramic Ball Bearings, hybrid ceramic bearing and full ceramic bearing, . 2:The hybrid ... zirconia or zirconium oxide, they are white colored, a ZrO2 ball looks exactly like a pearl. The ceramic material is not ...