The HP 220 Volt Fuser Kit for the HP Color LaserJet 4500/4550 printers includes fuser, four paper rollers and two air filters. Typical life is 100, 000 black-only pages or 50, 000 four-color pages, based on 5% average coverage. HP Ultraprecise Spherical Color Toner is chemically grown for uniform particles and consistent color.