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.

Compatible with:
HP DeskJet F300, D1400, D1500, D2300, D2400, F2100, F2200, F22200, F4100 series, HP OfficeJet 4300, 5600, J3600, J5500 series, HP Printer / Scanner / Copier 1400 series, HP Fax 3100 series