Do it Wiser Compatible Sharp MX-31NTBA Toner for Sharp MX-2600N, MX-3100N, MX-4101N, MX-5001N, MX-4100N Printers - Black Estimated page yield: 18000 pages (depends on printer and usage) Compatible with part number: Sharp MX-31NTBA Compatible printer models: Sharp MX-2600N, Sharp MX-3100N, Sharp MX-4000N, Sharp MX-4010N, Sharp MX-5000N, Sharp MX-5001N Our Do it Wiser smart toner cartridges are covered by a 1 year warranty against defects Cartridges certified to work | ISO 9001 quality assurance | ISO 14001 environmental management | RoHS Lead Free 1 Black cartridge18,000pages Sharp MX-2600N Sharp MX-3100N Sharp MX-4000N Sharp MX-4010N Sharp MX-5000N Sharp MX-5001N