The E Z Ink 4 Pack Compatible Ink Cartridges are specifically designed for HP 950 XL Black and 951 XL Y,C,M printers. This product offers high-quality, compatible ink cartridges that are ideal for printing in black. With the brand being E-Z Ink and the compatibility with HP printers, users can trust that their prints will be of top-notch quality and consistency. The 4 pack ensures a longer-lasting supply for printing needs.