1.high quality products and the most competitive prices 2.high-grade refactory materials white aluminium ... oxide powder as raw materials, smelting fusde together. It has the color white ,high hardness, low toughness, high purity, excellent self ... #,800#,1000#,1200#,1500#,2000#,2500#,3000#,4000#Refactory grade: 1-0mm,3-1mm,5-3mm,5-8mm-200mesh,-240mesh,-300mesh specificationChemicalcomposition ...