HP 11 Black Original Printhead (C4810A) 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 (C4810A) Color: Black Works with HP No. 10 black ink cartridge Also works with HP No. 11 or 82 color ink cartridges Supports HP's Color Layering technology Designed with high nozzle density for extra-fast printing Built-in smart chip; ultra small ink drop size