These printers use the LC41M cartridge:

Brother DCP 110 C

Brother DCP 115 C

Brother DCP 117 C

Brother DCP 120 C

Brother DCP 310 CN

Brother DCP 315 CN

Brother DCP 340 CW

Brother FAX 1835 C

Brother Fax 1840 C

Brother Fax 1940 C

Brother Fax 1940 CN

Brother Fax 2440 C

Brother IntelliFax 1840 C

Brother IntelliFax 1940 CN

Brother IntelliFax 2440 C

Brother MFC 210 C

Brother MFC 215 C

Brother MFC 410 CN

Brother MFC 420 CN

Brother MFC 425 CN

Brother MFC 620 CN

Brother MFC 640 C

Brother MFC 640 CW

Brother MFC 820 CW

Brother MFC 3240 C

Brother MFC 3340 CN

Brother MFC 5440 CN

Brother MFC 5840 CN