1.good quality and high purity 2.used for abrasives and sandblasting 3.ISO 9001:2008 4 OEM Brown fused aluminais ... made mainly from bauxite, carbon materials and iron ... bronze and make advanced refactory. The detail information:Brown Fused AluminaF grits for Bonded Abrasives14# ,16#,20#,22#,24# , 30#,36# ,40 ...