White Fused Alumina: Al2O3 99.0%min, SiO2 0.2%max, Fe2O3 0.1%max, Na2O 0.4%max, Size: 0-1,1-3,3-5mm etc. White Fused Alumina Al2O3 99.0%min,SiO2 0.2%max,Fe2O3 0.1%max,Na2O 0.4%max,Size: 0-1,1-3,3-5mm Refractory temperature: 1900True density: 3.90kg/m3Bulk density: 1.50-1.95kg/m3