Toner cartridge

A process unit, comprising:

• a toner cartridge comprising a housing capable of accommodating toner and having six peripheral walls, the housing including (i) a first surface formed on a first peripheral wall of the six peripheral walls and having a first circumferential surface and (ii) a second surface formed on a second peripheral wall of the six peripheral walls and having a second circumferential surface, the first peripheral wall having a first hole, the second peripheral wall having a second hole, a first shutter movable relative to the housing along the first circumferential surface between a first closed position at which the first opening is closed and a first open position at which the first opening is opened, and a second shutter movable relative to the housing along the second circumferential surface between a second closed position at which the second opening is closed and a second open position at which the second opening is opened;
• and
• a photoconductive drum,
• wherein the toner cartridge is mountable on the process unit, and
• wherein the toner cartridge comprises at least one protrusion configured to engage with the process unit in a state in which the toner cartridge is mounted on the process unit.