Printers, like anything else, are susceptible to wear and tear. Throughout a printer's lifespan, fuser assemblies, transfer units, and various other rollers and pads will likely need to be replaced in order to keep the printer functioning correctly. Maintenance kits typically include various rollers, a fuser assembly and a transfer unit. At Office-Link, we offer high quality compatible Dell maintenance kits at a fraction of the price you would pay for OEM parts. All of our compatible printer maintenance kits come with step by step instructions.