With the HP 903 ink cartridges, you get new ink for your HP OfficeJet Pro 6950, 6950, or 6970 printer. You can choose the 3-in-1 color cartridge or black cartridge. Did both run out? There's also a combo pack, in which you receive both cartridges. Do you print a lot and often? Go for the HP 903XL cartridges. These have more content and are more affordable per printed page than regular cartridges.