... %: size:3-70mm, 20-70 with same price, Alumina pebbles, used in ceramic tile, cement, chemical, mineral 95% :Advantages:The products are featured ... The alumina balls’ wear resisting is higher than the common ceramic balls’. When it is working, the ball will not pollute ... purity and improve the stability of grinded materials especially the ceramic glaze.2. High density: the high density, high hardness ...