These printers use the TN-229M cartridge:
Click On a Printer to View it's Cartridges
          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