Renewable Toner Compatible Toner Cartridge Replacement for HP 507A 507X for HP LaserJet M551 M575 (Cyan, Magenta, Yellow, Black, 4-Pack) LOW COST, HIGH VALUE. RT replacement for HP 507A 507X toner. Printing cost is as low as .04 cents per page, up to 50% less than HP 507A original toner cartridges. QTY: 4 | OEM #: HP 507A / HP 507X HP CE400X | HP CE401A / HP CE402A / HP CE403A For use in HP LaserJet Enterprise M551 M551n M551dn M551xh M575 M575f M575dn Black High Yield: 11,000 pages | CMY: 6,000 standard pages at 5% coverage LIFETIME WARRANTY: we always honor our warranty, even if the Amazon return window has closed