The TN450 laser toner from Lxtek Products is a 100% new compatible laser toner that is Guaranteed to meet or exceed the print quality of the OEM (Original Equipment Manufacturer) Brother IntelliFax-2840 laser toner. We also carry the DR420 drum unit for the Brother IntelliFax-2840. You can replace the laser toner without replacing the DR420 drum unit. You will need to replace the DR420 drum unit occasionally. Purchasing our Brother IntelliFax-2840 laser toner is an excellent way to save money without sacrificing quality. Our Brother IntelliFax-2840 laser toner cartridge has a '100% Satisfaction Guarantee'. The use of our compatible laser toner and drum for the Brother IntelliFax-2840 does not void your printer's warranty.