Professional Inert Alumina Ceramic Balls manufacturer ISO9001:2008 approved ZhongXing Inert Aluminum Ceramic ... from 2mm to 75mm per customer request. The Ceramic balls’ alumina content could also be 17%, 19%, 25%, 50%, 65%, 70 ... density(kg/m3) 1300-14001400-15001500-16001600-18001900-2200 High Alumina Ceramic Balls Al2O3SiO2Fe2O3Na2OMgOTiO2Proportion (g/cm3)Porosity rate (%)>99%<0.2 ...