Toner cartridge delivers outstanding results page after page in your Lexmark E250d, E250dn, E350d & E352dn. Superior Lexmark design means precision pairing between printer & cartridge for value, quality & environmental responsibility you can count on. Lexmark Return Program cartridges are patented print cartridges sold at a discount in exchange for the customer's agreement to the license requirement that the cartridges will be used only once & returned only to Lexmark for remanufacturing or recycling. Cartridge yields approximately 3,500 pages.