3M 236U 5in Hookit Clean Sand Paper GOLD - 120 Grit - 50 Pack3M coated 236U hook & loop disc uses aluminum oxide as the abrasive material and has a diameter of 5 in. 3M incorporates this aluminum oxide material into the hook & loop disc forming a grit of P120. All abrasive products that rotate or spin, such as the ones in this category, have a maximum speed at which you can run them. This 3M hook & loop disc can be run at a maximum speed of 10000. Sale Unit: DISC Brand: 3M Abrasive Type: Coated Disc Diameter: 5