These printers use the TN336BK 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