This developer works optimally with Unison toner. The unique composition of Unison toner delivers consistently high image quality, ensures the longevity and reliability of the printing system, and provides exceptional sustainability—all within an innovative, shake-free printing system. It is therefore indispensable for the performance of the Lexmark printing system. A new dimension in durability. Outstanding performance and maximum capacity for a true investment in greater efficiency and the future of your business. Original Lexmark supplies are designed for optimal interaction with your Lexmark printer, delivering excellent print quality from the first to the last page. Environmentally conscious printing has never been easier. Recycle all your empty Lexmark supplies by leaving the details to them—simple, smart, and free of charge.