Lexmark Unison Original Ultra High Yield Laser Toner Cartridge - Black PackThe Lexmark Unison Original Ultra High Yield Laser Toner Cartridge in Black Pack is a pure, authentic Lexmark supply designed to deliver consistent, professional results print after print. Built on Lexmarks Unison toner technology, this cartridge is engineered to stay true to the original designproducing deeper, more uniform blacks with less toner migration so you get bold text, crisp graphics, and smooth, clean pages from the first page to the last.