With these HP Photosmart cartridges, you can replace the ink of your HP Photosmart printer. Which ink cartridges you use depends on your printer model. Make sure to check which printer series you have first, so you always buy the right cartridges. You can find the model on the front and back of your printer. There are regular cartridges or XL cartridges. Do you print a lot? Save money with an XL ink cartridge. These cartridges have a higher capacity.