The Brother HL-6180DWT printer uses the TN720, TN750, and TN780 toner cartridges. Toner Refill Store's Toner Cartridges are 100% guaranteed to meet or exceed your expectations and surpass the print quality of the OEM (Original Equipment Manufacturer) Brother HL-6180DWT. Our Brother HL-6180DWT high yield Toner Cartridges have a 'One Year 100% Satisfaction Guarantee'. The use of our premium compatible laser toner cartridges for the Brother HL-6180DWT does not void your printer's warranty.