These printers use the TN115Y cartridge:
Click On a Printer to View it's Cartridges
          Brother DCP 9040 CN
          Brother DCP 9040 CN Color
          Brother DCP 9042 CDN
          Brother DCP 9045 CDN
          Brother DCP 9045 CDN Color
          Brother HL 4040 CDN Color
          Brother HL 4040 CDW
          Brother HL 4040 CN
          Brother HL 4040 CN Color
          Brother HL 4040 CDN
          Brother HL 4040 CW
          Brother HL 4070 CDW
          Brother HL 4070 CDW Color
          Brother MFC 9440 CN
          Brother MFC 9440 CN Color - MFP
          Brother MFC 9450 CDN Color
          Brother MFC 9450 CDN
          Brother MFC 9840 CDW
          Brother SD 10 Y - HL-4050CDN