For models: Brother HL-3140CW, HL-3170CDW, HL-3180CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW
Average cartridge yield: 2,500 approximate pages based on 5% coverage (actual yield depends on specific use including images printed, printer, print settings and other factors)
MFG Part Numbers: BTN221BK-CM, TN221, TN221BK