3M™, 7000044975, Film Roll, Microfinishing, 50 ft Roll Overall Length, 4 in Overall Width, 30 micron Grit, Fine Grade, Diamond Abrasive, 5 mil Polyester Film Backing, Green, Applicable Materials: Chrome Carbide, Nickel Based, Non-Ferrous Metal, Chilled Cast Iron, HVOF, Chrome Oxide, Glass, Ceramic, Tungsten Carbide and Hard Filled Rubber