With this Original HP 42X (Q5942X) Black Toner Cartridge you can achieve extremely high quality, sharp text with smooth greyscale images for the life of the cartridge. The Genuine Q5942X Toner Cartridge achieves this by using Hewlett Packards microfine black Toner formulation, which ensures long-lasting, laser sharp prints. The Original HP 42X Black Toner Cartridge provides great value for money with its page yield of 20,000 (based on a 5% coverage). The Q5942X Cartridge is designed to be used in a range of HP Printers a complete list of compatible Printers can be found on this page. All of our Original Cartridges come with our 100% satisfaction guarantee.