... standard product for universal metal working ,especially surface grinding. Size:100*16mm Grit:40#-400# Aluminum Oxide Flap Disc with Fibreglass Backing ... ,wooden,hardware factroy.Grit:40#,60#,80#,100#,120#,150#,180#,240#,320#size:100*16mm,115*22mm,125*22mm,150*22mm,180 ...