Premium Quality Compatible Toner Cartridge Replacement for HP C4129X Package contains 1 Replacement Compatible C4129X Toner Cartridge For use in the following printer models: HP LaserJet 5000, 5000dn, 5000gn, 5000n, 5100, 5100dtn, 5100tn Page Yield: 10,000 @ 5% page coverage Product Comes with a 1 year 100% Satisfaction Guarantee! Laser Tek Services offers free technical support for any questions you may have. Manufactured by ISO and STMC certified facility.| The Use of Laser Tek Services compatible products will not void your printers warranty.