Return Program toner cartridge is essential to Lexmark Print System performance. Unison toner consistently delivers outstanding image quality, ensures long-life system reliability and promotes superior sustainability - all in an innovative, shake-free print system. Cartridge is compatible with Lexmark B3340dw, B3442dw and MB3442adw. Genuine Lexmark supplies are engineered to work best together with your Lexmark printer, delivering excellent print quality from the first page to the last. Return Program toner cartridge is a patented device that is sold at a special price subject to the restriction that the cartridge may be used only once. Following the initial use, return the cartridge only to Lexmark for remanufacture and/or recycling. Cartridge yields approximately 1,500 pages.Return Program toner cartridge is essential to Lexmark Print System performance. Unison toner consistently delivers outstanding image quality, ensures long-life system reliability and promotes superior sustainability - all in an innovative, shake-free print system. Cartridge is compatible with Lexmark B3340dw, B3442dw and MB3442adw. Genuine Lexmark supplies are engineered to work best together with your Lexmark printer, delivering excellent print quality from the first page to the last. Return Program toner cartridge is a patented device that is sold at a special price subject to the restriction that the cartridge may be used only once. Following the initial use, return the cartridge only to Lexmark for remanufacture and/or recycling. Cartridge yields approximately 1,500 pages.