Xerox WorkCentre 7830/7835/7845/7855 BLACK Toner Cartridge (26, 000 Pages) for WorkCentre 7525/7530/7535/7545/7556 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.