InkOwl Toner Refill Kit for HP C4096A (96A), CANON L50 (4-Pack) Includes 4 bottles of Ink Owl premium formulation toner, a spout for easy pouring, easy-seal tape, and detailed, graphic instructions. To refill this cartridge model, you'll need to pierce holes. 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 holes. To get the tool: http://www.amazon.com/dp/B008J4P5JU Our instructions will guide you step-by-step through the entire refill process and include pictures showing you exactly where holes need to be pierced. Each bottle contains 240g of toner powder for a total of 20000 pages at 5% page coverage.