InkOwl Toner Refill Kit for BROTHER TN-221, TN-225 (4-Pack) Includes 4 bottles of Ink Owl premium formulation toner (60g each), 4 spouts for easy pouring, easy-seal tape, and detailed, graphic instructions. To refill this cartridge model, you'll need to pierce a hole. To do so, it is highly recommended that you use a laser cartridge holemaking tool designed for this purpose. The use of any other tool, including a drill, is not recommended to avoid damaging sensitive internal components. You can then use the provided easy-seal tape to seal the hole. To get the tool: http://www.amazon.com/dp/B008J4P5JU Our instructions will guide you step-by-step through the entire refill process including the procedure to access the toner reset menu on your printer to reset the displayed levels to full. Includes enough black toner powder for 2500 pages of black at 5% page coverage. Includes enough of each color for 2200 pages at 5%. These are the same yields as the original BROTHER TN-221 black and TN-225 color high yield cartridges. This product will work on all cartridges including starter cartridges.