LD Remanufactured Toner Cartridge Replacement for HP 27X C4127X High Yield (Black, 2-Pack) Page Yield: 10,000* per cartridge | Shelf Life: 24-36 months per cartridge | *Average printer cartridge page yield in accordance with ISO 19752 The use of remanufactured cartridges and supplies does not void your printers warranty All LD branded products are backed by a 100% satisfaction and LIFETIME guarantee These remanufactured toner contains up to 85% new parts including brand new wiper blades, OPC drums, and other internal components For use in the following HP LaserJet Printers: 4000, 4000n, 4000se, 4000t, 4000tn, 4050, 4050 usb-mac, 4050n, 4050se, 4050t, and 4050tn