InkOwl Toner Refill Kit for HP CF210A (131A) (Black, 1-Pack, with reset chip) Includes 1 bottle of Ink Owl premium formulation toner, 1 spout for easy pouring, 1 reset chip, 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 cartridge, we have included a replacement reset chip for your CF210A cartridge. 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 toner powder for 1600 pages at 5% page coverage. This is the same yield as the original HP standard-yield black cartridge.