Toner cartridge - black - 3000 pages - lexmark black and white all-in-one 4-series (mb3442i), lexmark black and white printer 3-series (b3340dw), lexmark blackand white printer 4-series (b3442dw), lexmark mb3442adwLexmark Unison Original High Yield Laser Toner Cartridge Black 1 Each Experience reliable, high quality printing with the Lexmark Unison Original High Yield Laser Toner Cartridge in Black. This cartridge is engineered to work seamlessly with Lexmark monochrome laser printers, delivering consistently sharp text, smooth graphics, and dependable page yieldsso you can print professional documents, reports, marketing materials, and everyday office