Return Program toner cartridge offers a high yield and is essential to Lexmark Print System performance. Unison toner consistently delivers outstanding image quality, ensures long-life system reliability and promotes superior sustainability – all in an innovative, shake-free print system. Cartridge is compatible with Lexmark MS417dn, MS517dn, MS617dn, MX417de, MX517de and, MX617de. 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 toner cartridge is a patented device that is sold at a special price subject to the restriction that the cartridge may be used only once. Following the initial use, return the cartridge only to Lexmark for remanufacture and/or recycling. Perfect for high-volume printing, high-yield cartridge maximizes your savings, yielding approximately 8,500 pages.