This 6 pack of NEW SEALED unbranded number 72 ink cartridges is a compatible replacement for HP DesignJet printers, specifically the T610, T620, T770, T790 series. The ink cartridges are color-coded in cyan, yellow, magenta, gray, and 2 black, offering a variety of colors for printing. With a total of 6 cartridges included in the pack, this unit is ideal for those looking to replenish their printer ink supply efficiently. These ink cartridges are designed for inkjet print technology, ensuring high-quality prints with each use.