Renewable Toner Compatible Toner Cartridge High Yield Replacement HP 27X C4127X for use in HP LaserJet 4000 4050 (Black, 2-Pack) Lifetime Warranty. We always honor our warranty, even if the Amazon return window has closed. Contact us directly with any questions or issues. Color: Black | Qty: 2-Pack OEM #: HP 27X / C4127X High Yield: 10k Pages based on 5% coverage For use in HP LaserJet Printers: 4000 / 4000n / 4000t / 4000tn / 4000se / 4050 / 4050n / 4050t / 4050tn / 4050se