The 645A model guarantees perfect printing results. The original cartridge impresses with long-lasting and vibrant colors, ensuring you the highest quality for your prints. For years, Hewlett-Packard has been setting the stage for perfect printing results with groundbreaking developments in inkjet, laser, and dot matrix printers. To always achieve the best printing results from each technology, HP develops consumables that are precisely tailored to different applications. Thus, using original HP consumables ensures the best possible print quality. Additionally, HP consumables contribute to the long lifespan of your device.