These printers use the TN223C cartridge:
Brother DCP-L 3510 CDW
Brother DCP-L 3550 CDW
Brother HL-L 3210 CW
Brother HL-L 3230 CD
Brother HL-L 3230 CDW
Brother HL-L 3270 CDW
Brother HL-L 3290 CDW
Brother MFC L-3750 CW
Brother MFC-L 3710 CW
Brother MFC-L 3730 CDN
Brother MFC-L 3750 CDW
Brother MFC-L 3770 CDW