These printers use the PC-401 cartridge:

Brother Fax 560

Brother Fax 565

Brother Fax 580 MC

Brother Fax 645

Brother Fax 685 MC

Brother Fax 727

Brother Fax 737 MC

Brother IntelliFax 560

Brother IntelliFax 565

Brother IntelliFax 580

Brother IntelliFax 580 MC

Brother MFC 660 MC

Brother MFC 960 MC

Brother PPF 560

Brother PPF 580 MC