Xerox B310 Drum Cartridge (40000 Pages) is specially formulated and tested to provide the best image quality and most reliable printing you can count on page after page. Xerox Genuine Supplies and Xerox equipment are made for each other. Accept no imitations.Compatible Printers: Xerox B 305 dn, Xerox B 310 Series, Xerox B 315 dn, Xerox B 310 dn