The HP 15 Black Ink Cartridge Twin Pack is a genuine, unopened product from HP that is compatible with various HP printer models such as Deskjet, Officejet, and Printer/Scanner/copier 500, 700, and 950. This twin pack includes two black ink cartridges designed for high-quality printing results. Although the cartridges are expired as of November of 2011, they are still traditionally able to provide reliable printing performance for your printing needs.