These printers use the TN-339BK cartridge:
Click On a Printer to View it's Cartridges
          Brother HL L-9200 CDW
          Brother HL L-9200 CDWT
          Brother HL L-9300 CDWTT
          Brother MFC L-9550 CDWT
          Brother MFC L-9550 CDW
          Brother MFC L-9950 CDWT