HP C8061X Black Toner Cartridge, Designed precisely for the HP LaserJet 4100 Printer series. Smart cartridges featuring HP Smart Print Supplies System—the intelligent system for carefree printing. Enhanced Smart product features include supplies status and usage information, Internet enabled supplies ordering, a no-shake cartridge, EP adjustments, and cartridge authentication. Designed for high volume usage. Average cartridge yields 10,000 standard pages.