... F16, F24,F36,F46 F60,F80,F120,F180,F220, for refractory: sand in group size :0-1mm, 1- ... 0-25mm .. Model: WA Chemical compositions Physical propertiesItemsValue of specification (%) ItemsPropertyAl2O3 99.55min ColorWhiteSiO2 0.05max Bulk density1 ... hardness21600-22600kg/mm3 Usage Sandblasting content of magnetic substance0.0023%max... WFA alumina abrasive powder for polishing and blasting