This user-replaceable maintenance cartridge is an essential component of the printer. It has been specifically designed to capture the ink used during print head cleaning, as well as any excess ink during printing operations. The compatible printer will notify you when the maintenance cartridge is full and needs to be replaced. The design of the cartridge allows for easy replacement, as it is located at the front of the printer and is easy to grasp. It can also be replaced without the risk of leaking.