Over time, your LaserJet 9000 printer will start to suffer from diminished print quality and operation as parts become worn out. By installing this genuine HP User Maintenance Kit, you can replace worn and damaged parts to create crisp and clear prints as good as the day you bought your printer. It includes a fusing assembly for secure toner adhesion, ensuring dark text and clear images. It also includes a set of rollers for feeding paper from the trays, helping to prevent jams.