This is a remanufactured C4127X / 27X high yield black laser toner cartridge for HP LaserJet 4000, 4000N, 4000T, 4000TN, 4000SE series and HP LaserJet 4050, 4050N, 4050T, 4050TN, 4050SE series printers. High-capacity cartridge prints approximately 10,000 pages at 5% coverage per page.