3M Cubitron 747D straight cartridge roll uses ceramic as the abrasive material and has a diameter of 3/8 in. 3M incorporates this ceramic material into the cartridge roll forming a grit of 80. The cartridge roll has a length of 1 1/2 in. 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 cartridge roll can be run at a maximum speed of 24000.