Help documents get an even distribution of toner with this belt unit. The 50000-page yield makes it easy to go for longer periods of time before needing to get a replacement. This Brother belt unit is made for use with select Brother machines for simple, quick installation and high-quality results. You can count on the durability of this printer belt unit. Unmatched reliability means you get long-lasting, high quality results. OEM replacement parts equal proven quality. For use with Brother DCP-9040CN, DCP-9045CDN, HL-4040CDN. Works in HL-4040CN, HL-4070CDW, MFC-9440CN. Also compatible with MFC-9450CDN, MFC-9840CDW.