Sandblasting aluminum oxide grain, brown corundum, brown aluminium oxide, brown fused alumina Description:AETL is a very tough brown fused aluminum oxide abrasive with ... 2090 Knoop scale, 9.0 Mohs scaleMagnetic Material 0.0076% Grain Sizes Available (F):12, 14, 16, 20, 22, 24, 30 ... , 46, 54, 60, 70, 80, 90, 100, 120, 150, 180. Grain Size Distribution :Upon ANSI B74.12-2001, FEPA-Standard 42 ...