HEWLETT PACKARD - HP No. 11 Cyan Ink Cartridge, 28 ml., is part of a modular ink system that delivers fast printing automatically. HP No. 11 and 84 Ink cartridges achieve ultimate photo-quality images in concert with the HP No. 11 and 84 printheads. "Smart chips" embedded into each of the individual printheads and ink cartridges track printhead wear and ink usage and automatically work with the printer to ensure high-quality prints. HP No. 11 and 84 ink cartridges are HP engineered and tested to work precisely with the HP DesignJet 10PS, 20PS & 50PS Series printers to deliver the professional results you expect.