Hewlett Packard 20 produce HP professional quality results every time, even on standard paper. HP pigmented ink produces robust, laser-like deep black ink and crisp clean lines. Specially designed for use with HP Inkjet speciality papers, HP 20 cartridges can also be used with transparencies and everyday papers to produce outstanding print quality. Use with your DeskJet printer, the 28ml cartridge will last for up to 455 pages of high quality printing.