Essential to Lexmark print system performance, Unison Toner's unique formulation consistently delivers outstanding image quality and ensures long-life print system reliability-all in an innovative shake-free print system. High Yield: Maximize your savings and enjoy premium quality with Genuine Lexmark cartridges. High Yield cartridges offer a lower cost per page and contain more pages than Standard Yield cartridges do. Perfect for high volume printing. Best Together: Genuine Lexmark supplies are engineered to work Best Together with your Lexmark printer, delivering excellent print quality from the first page to the last. Lexmark Cartridge Collection Program: It's simple, smart and always free. Lexmark Return Program Cartridges: Lexmark Return Program cartridges are patented print cartridges sold at a discount in exchange for the customer's agreement to the license requirement that the cartridges will be used only once and returned only to Lexmark for remanufacturing.