The HP 19 Black Inkjet Print Cartridge delivers professional-quality results, even on plain paper. It has been specially designed to work reliably at changing altitudes and temperatures, which makes it ideal for the business traveler. The HP 19 Black Inkjet Print Cartridge works with the HP 49 Tri-color Inkjet Print Cartridge to produce brilliant color images and sharp text. Yield: 485 pages, based on 5 percent density.