3M 31801 Green Corps File Belt Abrasive 1/2" X 18" 36Grit 20/Pack

3M GreenCorps file belt uses A/O aluminum oxide AO as the abrasive material. 3M incorporates this A/O aluminum oxide AO material into the file belt forming a grit of 36. This particular 3M sanding belt is 1/2 in wide by 18 in long.