Compatible
Brother PC-101 Black Thermal Fax Cartridge compatible with:
IntelliFax 1150 IntelliFax 1250 IntelliFax 1350 IntelliFax 1450 IntelliFax 1550 IntelliFax 1850 IntelliFax 1950
MFC 1850 MFC 1950
The use of compatible supplies does not void your printer warranty