Model: White fused alumina F320 Chemical compositions Al2O3: 99.50%min SiO2: 0.04%max Na2O: 0.26%max Fe2O3: 0.05%max. Physical properties Color: White Bulk density: 1.75-1.95g/cm3 Grain density: 3.90g/cm3min Morse hardness: 9 Content of magnetic substance: 0.0023%max. 25kg PVC bags + 1MT big bag