Print more and save more with the HP 56/57 Tri-colour & Black Ink Cartridges. If you have a Hewlett-Packard printer compatible with the HP 56 or 57 ink cartridge then you owe it to yourself to use genuine HP supplies. This great-value combo-pack includes an HP 56 black and HP 57 tri-colour ink cartridge. Together they produce crisp, black text and rich, vibrant colour. The HP 56/57 Tri-colour & Black Ink Cartridges is an affordable way to get the best out of your HP inkjet printer!