Premium Quality 51626A Black Inkjet Cartridge compatible with the HP 2276a, 2277a, 2279a DeskWriter, C2121A, C2124A, DesignJet 200, 220, 600, DeskJet 200cci, 400, 420, 500, 505k, 510, 520, 540, 550c, 560c, DeskJet Plus, DeskWriter 400 Also fits Agfa, Apollo, Apple, Citizen, Daewoo, DEC, Encad, Olivetti, Olympia, Panasonic, Pitney Bowes, Sharp, Siemens, Stielow, Triumph Adler, and many other. The use of compatible supplies does not void your printer warranty. Product Detail Ninestartechonline.com