For each of the six colors used in the Printer, there are three separate components. The Printhead and the Printhead Cleaner are supplied together, the Ink Cartridge is supplied separately. All of these components are called the HP Ink Supplies. They are coded with an HP selection number to help you re-order the correct replacement supplies.The Printhead and the Printhead Cleaner are supplied together, and the Ink Cartridge is supplied separately. These consumables are designed with a lock-out feature that will allow only one color to be inserted into a given slot.

-No.81 - HP Selection Number for Dye Ink Supplies.
-No.83 - HP Selection Number for UV Ink Supplies.