... abiasives since 1999 2. Al2O3 purity 99.6% min 3.Refractory material 4.group sizes 12-220 240-1200 #12-1200 ... steel and high carbon steel.(2)It also usually used for sandblasting, such as precious metal, the gold, crystal, the glass ... the superior refractory products.0-1,1-3,3-5,5-8mm and 180,200,240,280,320F Bacmac Aluminium Micropowder Brown Fused Alumina