smart choice. long-life print heads and hp 90 printhead cleaners work with hp designjet 4000 printers to deliver fast, reliable and cost-effective operation. get consistently outstanding results from accurate line drawings to photo-quality color images. hp 90 printheads and printhead cleaners produce consistent results from accurate line drawings to photo-quality color images. hp smart printing technology in hp printheads, ink cartridgees and printer optimizes print quality. reliability saves time and increases productivity. enjoy low-maintenance printing. hp 90 printheads and printhead cleaners are part of a large format printing system designed for efficient operation and easy installation. hardware compatibility: hp designjet 4000/4500 series printers ink drop: 5 pl