1Al2O3 99% 2NAO 0.3% 3Fe2O3 0.1% 4Hardness(mohs) 9 5 Ture density 3. ... (WA)Al2O3 99.53%...........NaO 0.3%.........Fe2O3 0.1%......... Magnetic material content 0.0023%.....color white ……hardness( ... 1000#,1200#,1500# 2000#,2500#,3000#,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,- ... FOR BEST ABRSV. & REFRA. PRODUCT AT BEST PRICE BASED BEST SERVICE---- We sincerely invite you to start business ...