With these Canon PIXMA G ink bottles, you can easily refill the ink tank of your printer. Depending on your model, you can refill your printer with the Canon GI-590 ink bottles or the Canon GI-51 ink bottles. Ink bottles come in different sizes, so they won't fit in every printer. Make sure to check which printer series you have, so you always buy the right ink bottle. Don't know your printer model? Check the included manual.