HP LaserJet 110V Maintenance Kit is designed for use with HP LaserJet Enterprise M604n, M604dn, M605n, M605dn, M605x, M606dn and M606x. It ensures your HP printer remains in working condition and continues providing your workers with the highest print quality possible. Maintenance kit yields approximately 225,000 pages. It includes user-replaceable parts that work with your HP printer to prompt you when they require maintenance.