Chemical Composition Al2O3≥92% SiO2≤7% CaO+MgO+Fe2O3+others 2% Bulk Density 3.60g/cm3 Water Absorption<0.01% Hardness(Mohs) ≥9 Self Wear Rate <0.01%(24h) Color White Size of Microcrystal Wear Alumina Ball(ROLLING) Dia(mm) 6-20 Character of Microcrystal Wear Alumina Ball(ROLLING): The strength of alumina ball by rolling is around 10% less than that by press method. It has higer cost performance than CIP. Notes: We can pack the products according to your requirement, also we can do OEM or ODM. The main application areas: Ceramic building materials Chemical.