Replace the ink of your HP ENVY printer with these cartridges. Which ink cartridge you use depends on your printer model. Each Ink has a unique size and doesn't fit in every printer. So make sure to check which printer model you have first, so you always buy the right cartridges. Don't know which printer model you have? 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.