... resistance 4.95/90/85/80/70 Brown fused alumina for buffing Product Description: Brown fused alumina is made ... ,crystal, choosing, magnetic, screening, etc. The brown fused alumina of our factory had high purity,detailed texture,high ... bauxite, corundum, white corundum, black corundum, silicon carbide, spinel and other refractory products. Strong economic strength, advanced production equipment ...