These printers use the TN336M cartridge:
Brother DCP L-8400 CDN
Brother HL L-8250 CDN
Brother HL L-8350 CDW
Brother HL L-8350 CDWT
Brother MFC L-8550 CDW
Brother MFC L-8600 CDW
Brother MFC L-8650 CDW
Brother MFC L-8850 CDW