1.supply abiasives since 1999 2. Al2O3 purity 99.6% min ... 12-220 240-1200 #12-1200 1..Chemical and physical Usage:JIS#10-JIS#240(1)It can make the abrasive tool ... gold, crystal, the glass and cowboy wear. JIS#280-JIS#4000(1)It can be used in grinding and polishing the gold ... can be used in making the superior refractory products.0-1,1-3,3-5,5-8mm and 180,200,240,280 ...