OverviewThe HP 21 Black Inkjet Print Cartridge with HP pigment-based inks prints professional-looking documents with laser-quality black text. Get results you can count on across a broad range of plain papers and speciality media.FeaturesThe HP 21 Black Inkjet Print Cartridge prints

OverviewThe HP 21 Black Inkjet Print Cartridge with HP pigment-based inks prints professional-looking documents with laser-quality black text. Get results you can count on across a broad range of plain papers and speciality media.FeaturesThe HP 21 Black Inkjet Print Cartridge prints professional-looking documents with laser-quality black text. HP pigment-based black ink provides crisp sharp text for your letters and reports.The HP 21 Black Inkjet Print Cartridge produces consistently reliable results every time. Great for greeting cards, educational projects, homework assignments, e-mail and letters and much more.HP 21 Black Inkjet Print Cartridges are simple to install and easy to use. Save time and money with on-screen ink-level indicator in your printer software. Alerts notify you when ink is running low so you can purchase a replacement cartridge.