Maintenance kit is designed the automatic document feeder of your HP LaserJet MFP CM4540, CM4540f, CM4540fskm, M4555f, M4555fskm and M4555h. It ensures your device operates at peak performance. Perform simple repairs and upkeep so you can sustain the exceptional paper-handling performance of the automatic document feeder. Kit includes user-friendly parts. Page capacity is approximately 9,000 pages.