These printers use the TN635XL Magenta cartridge:
Click On a Printer to View it's Cartridges
          Brother HL L-8430 CDW
          Brother HL L-8430 CDWT
          Brother HL L-8570 CDW
          Brother MFC EX-575
          Brother MFC L-8730 CDW
          Brother MFC L-8930 CDW
          Brother MFC L-8970 CDW