The HP 21 Black Inkjet Print Cartridge combines patented ink formulations with advanced inkjet print cartridge technology to ensure crisp, laser-quality black text every time you print. Pigmented black inks provide crisp sharp text for your letters and reports-documents you can be proud of from your HP printer. Keep your documents for a long-term reference. Printed text from this HP ink remains dark and sharp longer. Results you can count on across a broad range of plain papers and specialty media. Print greeting cards, homework assignments, letters, e-mail, and reports with confidence.

For use with :

HP Deskjet
3910, 3915, 3920, 3930, 3940,
D1360, D1460, D1470, D1560, D2330, D2360, D2430, D2460.

HP Deskjet All-in-One
F370, F375, F380, F390,
F2180, F2187, F2224, F2280, F2290,
F4140, F4172, F4180, F4190.

HP Fax
1250, 3180.

HP Officejet
4311, 4314, 4315, 4355, 4357,
J3680, J5520.

HP PSC (printer/copier/scanner)
1400 series (1402, 1410, 1415, 1417).