... .Corrosion resistance 4.95/90/85/80/70 supply brown aluminium oxide Product Description: Brown fused alumina is made by bauxite as ... are: coconut shells and husks, coal, woods, cylindrical products, powdered activated carbon, PAM, PAC, anthracite filter media, quartz sands, walnut shell ... look forward to have good relations of cooperation! ! supply brown aluminium oxide