MTI PRO HP 507A Cyan (CE401A) Compatible Toner Cartridge for HP LaserJet Enterprise 500 Printers: M551N, M551DN, M551XH, MFP M575DN, MFP M575F, MFP M575C Series If you do not receive your product in an MTI-branded box, it is not a genuine MTI product. Let Amazon know. HP Printers M551N, M551DN, M551XH, MFP M575DN, MFP M575F, MFP M575C Color: Cyan | Yield: 6,000 standard pages OEM Part #: HP CE401A (507A Cyan)