Toner Cartridges for OEM Printers from Xerox deliver brilliant image quality and excellent reliability at a low cost. Compared to the original OEM toner cartridge, you will get better or equal page yield, pay around 25% less, and receive a 100% lifetime warranty. This black laser toner cartridge is compatible with HP LaserJet 4000, 4050 printers and has a yield of 10,000 pages.