Renewable Toner Compatible Toner Cartridge High Yield Replacement HP 507X CE400X for use in LaserJet 500 M551N MFP M575 (Black) LOW COST, HIGH VALUE. RT replacement for HP 507X | HP CE400X Black. Printing cost is as low as 0.01 cents per page, up to 60% less than HP CE400X original toner cartridges. QTY: 1 | High Yield: 11k pages based on 5% coverage Replaces OEM #: HP 507X | CE400X black toner cartridge For use in HP LaserJet Enterprise 500 M551 | M551n | M551dn | M551xh | 500 MFP M575 | M575f | M575dn LIFETIME WARRANTY: we always honor our warranty, even if the Amazon return window has closed