Brother TN5000PF Black Black Premium Compatible - IntelliFax-2600, 2750, 3550, 3650, 3750, MFC-2750, 4300, 4350, 4450, 4550, 4550PLUS, 4600, 4650, 6550MC, 6650MC, 7550MC, 7650MC, 7750 - (2,200 pages). The use of compatible supplies does not void your printer warranty.