HP Q7551XC High-Yield black contract original LaserJet toner cartridge are proven to be more reliable than non-original alternatives . Cheap ink and toner cartridges can compromise your printer's performance, leaving you with streaked, blotchy or faded prints. Only original HP Supplies deliver unmatched quality for the most professional looking prints. HP creates new possibilities for technology to have a meaningful impact on people, businesses, governments and society. The worldвЂ™s largest technology company, HP brings together a portfolio that spans printing, personal computing, software, services and IT infrastructure to solve customer problems.