... , specially treatment angular grain shape, medium bulk density brown fused aluminum oxide abrasive, used for coated abrasive products. The ... 240, 280, 320, 360, 400, 500, 600 Grain Size Distribution :Upon ANSI B74.18-2006, FEPA-standard 43-1:2006 ... calcined aluminium oxide grain, high temperature treated brown fused aluminium oxide,fused brown corundum,corundum,brown fused alumina,brown aluminium oxide ...