... : 36~400# 3.High quality with low price. ALUMINIUM OXIDE FLAT WHEEL(ABRS-0014)BROWN GRID BACK Abrasive Grain Sizes: 36~400 ... kinds of wood, putty, glass and metal polishing and grinding.4 can be used for shipbuilding, automotive, aviation, machinery, instruments, furniture ... in various surface rust, paint, deburring, grinding welds. ALUMINIUM OXIDE FLAT WHEEL(ABRS-0014)