HP 11 Magenta Original Printhead (C4812A) HP 11 ink printheads work with: HP Business Inkjet 2800, 1000, 1100, 1200, 2300, 2600, cp1700. HP Designjet 10, 20, 50, 100, 120, 70, 100, 111, 500, 510, 800, 815, 820. HP Officejet 9110, 9120, 9130. HP Officejet Pro K850, K850dn. Up to 2x more prints with Original HP ink vs refill cartridges. Printhead Original HP ink cartridges: genuine ink for your HP printer. What's in the box: New Original HP 11 printhead (C4812A) Color: Magenta Replacement ink cartridge for Hewlett-Packard ink-jet printers Magenta color Easy to install Produces bright color prints Fast drying and smudge-free