HP 903, HP 903 XL inkjet cartridges are build as single tank cartridges. For each color of printer ink there is an individual ink tank. The print head for the HP 903 cartridges is not integrated into the cartridges - the print head is build into the sled compartment. That sled moves over the printer´s working area. The HP 903 inkjets are installed into this cartridge compartment. Each HP 903 is equipped with an ink chip.
Our tutorials and instruction provide information related to refilling HP 903 inkjet cartridges, how to handle the chips and how to clean the printer nozzles plus the whole print head manually.