... 4.95/90/85/80/70 Brown fused alumina for buffing Product Description: Brown fused alumina is made by bauxite as main material ... purification ,crystal, choosing, magnetic, screening, etc. The brown fused alumina of our factory had high purity,detailed texture,high ... filter media, quartz sands, walnut shell filters, garnet filters, polishing sands, rust sands, sponge iron, medical stones, ceramic ...