... 99% 2NAO 0.3% 3Fe2O3 0.1% 4Hardness(mohs) 9 5 Ture density 3.9 White aluminium oxide/white fused alumina ... #,80#,100#,120#,150#,180#,220#Micropowder:240#,280#,320#,360#,400#,500#,600#,800#,1000#,1200#,1500# 2000#,2500#,3000 ... #,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320meshPurposeSpecificationChemical Composition(%)Magnetic material content(%)maxAbrasives ...