The compatible Brother MFC-5840CN ink-jet cartridges from LD Products are Guaranteed to meet or exceed the print quality of the OEM Brother MFC-5840CN inkjet cartridges. Purchasing our compatible Brother MFC-5840CN ink cartridges is an excellent way to save money without sacrificing quality. Our Brother MFC-5840CN compatible Ink Cartridges have a '100% Satisfaction Guarantee'. The use of our compatible Ink for the Brother MFC-5840CN does not void your printer's warranty. We also carry OEM Cartridges for your Brother MFC-5840CN printer.