brown aluminium oxide grit No. 14 to 220 # Aluminum oxide is a tough, hard material (Mohs hardness 9 ... raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, metal preparation, laminates, coatings, lapping, polishing, grinding ... is specialized in WFA, BFA, corundum, white aluminum oxide, brown aluminum oxide, White Fused Alumina, Brown Fused Alumina, Silicon Carbide ...