... quality products and the most competitive prices 2.high-grade refactory materials white aluminium oxide is a high-quality aluminium oxide ... #,500#,600#,800#,1000#,1200#,1500#,2000#,2500#,3000#,4000#Refactory grade: 1-0mm,3-1mm,5-3mm,5-8mm-200mesh ... .0018micropowder240-4000≥98.5≤0.1≤0.4≤0.15—Refactory gradeGroup size0-1mm1-3mm3-5mm5-8mm≥99≤0.1≤0 ...