These printers use the TN229XXLBK cartridge:
Brother HL L-3220 CDW
Brother HL L-3280 CDW
Brother HL L-3295 CDW
Brother HL L-3300 CDW
Brother HL L-3320 CDW
Brother HL L-8245 CDW
Brother MFC L-3720 CDW
Brother MFC L-3765 CDW
Brother MFC L-3780 CDW
Brother MFC L-8395 CDW