The correct replacement toner cartridge for the Brother DCP-9055CDN or DCP-9055CDW printer models is the Brother TN325BK black toner. The TN325BK is the high capacity toner cartridge that can print around 4000 pages, however if you want to save a little bit of money and you don't need the high capacity cartridge, we also sell the
Brother TN320BK which will work in your printer model as well. The TN320BK will print up to 2500 pages.