Toner cartridge is specially formulated & tested to provide the best image quality & most reliable printing you can count on page after page. It is designed for use with Brother DCP-8040, DCP-8045D, HL-5140, HL-5150 Series, HL-5170 Series, MFC-8120, MFC-8220, MFC-8440, MFC-8640D, MFC-8840D & MFC-8840DN. Cartridge yields approximately 3,500 pages.