... 4Hardness(mohs) 9 5 Ture density 3.9 White aluminium oxide/white fused alumina(WA)Al2O3 99.53 ... white ……hardness(mohs) 9…….ture density 3.9Marterials: aluminaWhite aluminium oxide is electrically fused in the furnace ... ,etc.Abrasives gradeGrit size: 16#,20#,24#30#,36#,46#,54#,60#,80#,100#,120#,150 ... 2000#,2500#,3000#,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,- ...