These printers use the TN720 cartridge:

Brother DCP 8110 DN

Brother DCP 8150 DN

Brother DCP 8155 DN

Brother DCP 8250 DN

Brother HL 5440 D

Brother HL 5450 DNT

Brother HL 5450 DN

Brother HL 5470 DW

Brother HL 5470 DWT

Brother HL 6180 DW

Brother HL 6180 DWT

Brother MFC 8510 DN

Brother MFC 8520 DN

Brother MFC 8710 DW

Brother MFC 8810 DW

Brother MFC 8910 DW

Brother MFC 8950 DW

Brother MFC 8950 DWT