... grit for producing sanding belt,sanding paper,sand cloth,jumbo roll,fused abrown,corundum,brown aluminium oxide Description:AP-17 It ... .56%TiO2 2.25%SiO2 1.08%Fe2O3 0.08%Physical Properties:Color BrownShape Angular, edge sharpCrystal Form Alpha alumina trigonal ... -2: 1998 brown fused alumina for making sanding cloth jumbo roll