1.Material:Alumina ceramic 2.Vickers Hardness:1250~1300 3.Wear Rate: ... used a process of grinding,mixing, dispersion, Engineering Ceremic,Ceramic Capecitor,tiles,sanitarware,porcelain,Pigments,Enamels,cement,abrasive compounds ... , ceramic industry,other field would be paints, chemicals, electronics, plasticsISO certificate Alumina ceramic grinding ball