These printers use the TN221Y cartridge:
Brother DCP 9015 CDW
Brother DCP 9020 CDW
Brother HL 3140 CW
Brother HL 3150 CDN
Brother HL 3150 CDW
Brother HL 3170 CDW
Brother HL 3180 CDW
Brother MFC 9130 CW
Brother MFC 9140 CDN
Brother MFC 9142 CDN
Brother MFC 9330 CDW
Brother MFC 9340 CDW