MTI PRO Oki 44574901 (High Yield: 10,000) Compatible Black Laser Toner Cartridge for Okidata LaserJet Printers: B431, B431d, B431dn, MB461, MB461mfp, MB471, MB471w MFP, MB491 MFP Color: Black | Yield: 10,000 Pages Replaces OEM Part #: 44574901 Compatible Okidata LaserJet Printers: B431, B431d, B431dn, MB461, MB461mfp, MB471, MB471w MFP, MB491 MFP If you do not receive your product in an MTI-branded box, it is not a genuine MTI product. Let Amazon know.