Compatible with: HP LaserJet Enterprise 500 Color MFP M575dn, 500 Color M551dn, 500 Color M551xh, 500 Color MFP M575f, Color flow MFP M575c LaserJet Pro 500 color MFP M570dn Remanufactured Compatible Replacements Included: (2) 507X HP Toner / HP CE400X / Black High Yield Delivers 11,000 rich black pages just like the original HP 507X toner Average printer cartridge Page Yield* in accordance with ISO 19752. *at 5% coverage (ISO/IEC standard) The 507X / CE400X Black compatible toner cartridge Replaces the HP CE400A / HP Laserjet 507A Black Please contact us first with any product issues. We want all of our customers to be happy because happiness matters.