With the HP 338 and HP 343 cartridges, you can replace the ink of printers from the HP DeskJet, HP OfficeJet, HP Photosmart, and HP PSC series. If your specific printer supports the 338 and 343 cartridge line, you can see that in the description with the cartridges. This list contains all models where these cartridges fit, so that you no longer order wrong cartridges. You can purchase the cartridges as a color combo pack and as a separate black cartridge. This means you only buy the separate black cartridge, for example, when you mainly use black ink.