The Brother TN-321BK is the standard capacity black toner cartridge available for use in the Brother DCP-L8450CDW and all other printers listed in the compatibility pane. This makes it the cheapest original Brother cartridge available for your printer. When buying a genuine Brother TN321BK you can be assured of the very highest quality manufacturing and unbeatable print quality.Brother know the workings of all printers compatible with the TN-321BK and have designed this cartridge to work seamlessly with them all. All of the cartridges in the TN326 range have been designed for easy installation into your printer and the toner powder contained in the TN321BK will fuse to paper at the exact temperate produced by the machine.VAT and fast free delivery within the UK is included in the price you see listed here.