... the specification as follows: Common Ceramic Ball, Inert Alumina Ceramic Ball, Medium-Alumina Ceramic Ball, High-AluminaCeramic Ball and 99%-AluminaCeramic BallDia(Φ): 3, 6 ... for air separation which include small ceramic ball, porous columned ceramic ball and porous round ceramic ball.Characteristic : High crushing strength, corrosion resistance ... /32, 9/16, 19/32, 5/8, 11/16, 3/4, 1, 5/4 ceramic ball