... ,115*22,125*22,150*22,180*22mm material:A/O,ZIRCONIA ALUMINA revoluting speed:12500r/min backing:fibergals,plastic Radial ... *16,115*22,125*22,150*22,180*22mmmaterial: aluminium oxide/zirconia alumina speed:12500r/minbacking:fibergals,plastic aluminium ...