InkOwl Toner Refill Kit for HP CF210A, CF211A, CF212A, CF213A (131A) (4-Pack, with reset chips) Includes 4 bottles of Ink Owl premium formulation toner, 4 spouts for easy pouring, 4 reset chips, easy-seal tape along with 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 For the proper functioning of the refilled cartridges, we have included reset chips for your CF210A, CF211A, CF212A, and CF213A cartridges. 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 and will show you how to install the replacement chip. Includes 45g of black toner powder and 40g of each color for the full 1600-page yield of black and 1800-page yield of color (at 5% coverage) just like the original HP cartridges.