... materials manufacturer. We produce ceramic knife, zirconia grinding media, ceramic valves, zirconia powder Our zirconium grinding media is made from high quality raw materials ... , zirconium silicate balls, steel balls, agate balls and glass pearls, zirconia grinding mediumY-TZP grinding medium)has high density, high hardness ... :3×3,5×5,7×7,10×10,12×12mm zirconia Grinding media