You can comfortably meet your daily printing requirements with theHP 121XL Black Ink Cartridge. It delivers professional quality textsand images at an economical cost yielding up to 600 pages of blacktext. Its user-friendly features include monitoring ink levels andalerting you when the level is low so you can successfully completeyour important printing tasks. This black print cartridge is faderesistant, so prints remain bright as new even after several years.It is compatible with HP DeskJet D2500 printers, HP DeskJet D2530printers and HP DeskJet F4200 All-in-One printers.