... white fused alumina(WA)Al2O3 99.53%...........NaO 0.3%.........Fe2O3 0.1%......... Magnetic material content 0.0023%.....color white ……hardness(mohs) 9……. ... special ceramics and high-grade refractory materials,etc.Abrasives gradeGrit size: 16#,20#,24#30#,36#,46#,54#,60#,80#, ... #,1500# 2000#,2500#,3000#,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320mesh PurposeSpecificationChemical ...