Lexmark B231000 Black Toner — for B/MB2338, 2442, 2546, 2650 Series (Return Program)Lexmark Unison Original Standard Yield Laser Toner Cartridge Black 1 Each Experience standout black and white printing with the Lexmark Unison Original Standard Yield Laser Toner Cartridge in Black. Built for reliability, this cartridge leverages Lexmark's Unison technology to deliver consistently crisp text, sharp lines, and smooth, smear resistant graphics from the first page to the last. Designed to work seamlessly with Lexmark laser printers, it