... as follows: Common Ceramic Ball, Inert Alumina Ceramic Ball, Medium-Alumina Ceramic Ball, High-AluminaCeramic Ball and 99%-AluminaCeramic BallDia(Φ): ... 92%, 95% Size: Φ25mm-Φ75mm4. Ceramic ball for BearingCharacteristics:Compared with steel, ceramic materials are noted for their better ... 16, 7/32, 15/64, 1/4, 17/64, 9/32, 5/16, 11/32, 3/8, 7/16 ... , 31/64, 1/2, 17/32, 9/16, 19/32, 5/8, 11/16, 3/4 ...