These compatible cartridges contain chips designed to work with even the most recent Hewlett Packard firmware updatesThis multi-pack of remanufactured HP 903XL contains one of each of our equivalents to the Hewlett Packard part numbers T6M15AE, T6M03AE, T6M07AE and T6M11AE.Our remanufactured versions of the HP 903XL ink cartridges are filled to the same capacity as the original, meaning they maintain the same estimated page yield. These remanufactured alternatives to the genuine HP 903XL range have been tried and tested to offer exceptional results in all of the printers mentioned on this page, including the HP Officejet Pro 6950 inkjet printer.When using these compatible HP 903XL, you can expect wonderful prints from the moment they are installed right up until you need to pop in more high quality replacements. Produced by one of our most trusted manufacturers, the HP 903XL range come with a 100% satisfaction guarantee.