High-quality, Return Program imaging unit is essential to Lexmark ™ print system performance. Imaging unit is designed to work best with Unison ™ toner to perform in an innovative, shake-free print system. Genuine Lexmark ™ supplies are engineered to work best together with your Lexmark printer, delivering excellent print quality from the first page to the last. Return Program. Device Types: Multifunction Laser Printer; Color(s): Black; Supply Type: Drum Unit; OEM / Compatible: OEM.