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3M Cubitron 747D straight cartridge roll uses ceramic as the abrasive material and has a diameter of 1/2 in. 3M incorporates this ceramic material into the cartridge roll forming a grit of 60. 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.