Toner cartridge is designed for use with Hewlett-Packard Color LaserJet Printers CP3505, CP3505dn, CP3505n, CP3505x, 3800, 3800n, 3800dn and 3800dtn. 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. Remanufactured cartridge yields approximately 6,000 pages.