These printers use the TN-339Y 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