These printers use the TN223Y 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