... fused aluminais made mainly from bauxite, carbon materials and iron filings, smelting by high tempetures in ... Al2O3, its content is between 94.5% and 97%, and the other containing a small amount of Fe, ... can be used to forge rough iron and hard bronze and make advanced refactory. The detail information:Brown ... 70#,80#,90#,100#,120#,150#,180#,220#,240#P grits for Coated Abrasives14# ,16#,20#,22#,24# ...