Brother HL-2700CN MFC-9420CN Black Toner Refill Kit. Refills TN-04K. Manufactured by Toner Eagle. Toner is designed specifically to work in the Brother TN-04 cartridge. We test many toner samples from toner manufacturers. Most are rejected as they do not meet the look and specifications of the OEM toner. The toner we sell DOES match OEM toner! Save Up to $140 on Each Black TN-04 Cartridge. Refilling your own toner cartridges is more environmentally friendly than buying new, compatible, or even remanufactured toner cartridges. There is almost zero waste. We provide easy-to-follow instructions with photographs of the process. The process is so easy that most people do not need help. But if you do need friendly tech support, we are only a telephone call away. We guarantee that you will be happy with our productor we refund your money.