Toner cartridge delivers optimum text and graphics print quality in your Hewlett-Packard LaserJet Printers 1000, 1200, 1200n, 1200se, 1220, 1220se, 3300mfp, 3310, 3320mfp, 3320n mfp, 3330mfp and 3380. Proprietary automated equipment and ASTM testing methods ensure superior performance from each and every cartridge produced. State-of-the-art, automated filling equipment ensures precise fill weights for each cartridge. Independent testing has verified that this cartridge functions fully until end-of-life while yielding the same or more pages than OEM cartridges. Cartridge yields approximately 2,500 pages.