Designed to deliver quality and reliability, the HP 21 Black InkjetPrint Cartridge produces professional-quality prints that will notfade over time. It uses pigment-based ink to print crisp and sharptexts. This HP printer ink cartridge offers a yield of 190 pages,making an economical choice. Installation too is hassle-free. Thisblack print cartridge is compatible with the HP DeskJet printersand HP Officejet 4315 and J3680 all-in-one printers.