This is a set of cleaning cartridges for the HP 70 cartridge series. In this printer, the printheads are separate to the cartridges, and they can clog due to inactivity (dried up ink can clog the heads).

To clean the heads, you either need sophisticated equipment and cleaning solution, or you can use these easy to use cleaning cartridges that are provided with this item. This item includes a full set of HP 70 compatible cartridges (8 cartridges that contain cleaning fluid) along with instructions and tools to use them to clean your printheads.

Printers using these cartridges include:

HP Z2100 / Z3100 series