1.Material:Alumina ceramic 2.Vickers Hardness:1250 ... widely 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 ...