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