Compatible with Brother Multifunction Center and Plain Paper Fax models, including the following: MFC 4350, MFC 4450, MFC 4550+, MFC 4650, MFC 6550MC, MFC 6650MC, MFC 7550MC, MFC 7650MC, MFC 7750, PPF 2750, PPF 3550, PPF 3650, and PPF 3750.