16 x 8 x 5 ceramic bearings 1,ABEC7 2,High ... :Z1,Z2 5,C2,C0,C3... Lily bearing is a specialized manufacturer of 16 x 8 x 5 ceramic bearings. We have ... or zirconium oxide, they are white colored, a ZrO2 ball looks exactly like a pearl. the ceramic material is not stronger than ...