When buying a new printer, starter cartridges are usually included, but these are only sufficient for a few printouts. The TN-248BK (black), TN-248C (cyan), TN-248M (magenta) and TN-248Y (yellow) toners are required for the Brother MFC-L8390CDW. These cartridges are available in standard and high-yield versions, such as TN-248XLBK for black.