42804516 Black Toner to fit C3100. Page life - 3000. Deliver stunning, vibrant images and clean, crisp text every time with this high quality black laser toner cartridge for your OKI C3100 printer. The high standard of toner creates crisp text and images over and over again for up to 3,000 pages at 5% coverage. The lightweight, easy to install cartridge enables you to cut down on periods of inactivity for a faster and more efficient printing experience.