The LEXMARK CX410 4.0K 80C1HK0 Black Toner Cartridge by Lexmark. Guaranteed to perform in all Lexmark CX410 machines. Free shipping on two units! Each LEXMARK CX410 2.5K 80C1SK0 Black Toner Cartridge by Lexmark is for use in all Lexmark CX410 machines. Warranty is one year. Thank you for supporting U.S. businesses and the environment. Save your office money and keep empty toner cartridges out of the landfills.