The HP LaserJet Pro 400 M401dn printer uses either the standard yield CF280A or the high yield CF280X laser toner cartridge. Toner Refill Store's premium toner cartridges are 100% guaranteed to meet or exceed your expectations and surpass the print quality of the OEM (Original Equipment Manufacturer) HP LaserJet Pro 400 M401dn. We also carry numerous compatible and remanufactured HP inkjet cartridges. This HP Printer uses either a High Yield cartridge or Standard Yield cartridge. The High Yield cartridge will have an 'X' and the standard yield an 'A' at the end of the cartridge number. Toner Refill Store carries both the High Yield toner cartridges and toner refills for the CF280X and the Standard Yield toner cartridges and toner refills for the CF280A. Our HP LaserJet Pro 400 M401dn high yield laser toner cartridges have a 'One Year 100% Satisfaction Guarantee'. The use of our premium compatible laser toner cartridges for the HP LaserJet Pro 400 M401dn does not void your printer's warranty.