Lexmark Return Program Cartridges are sold at a discount versus the prices of regular cartridges in exchange for the customer's agreement to use the cartridge only once and return it only to Lexmark for remanufacturing or recycling. Regular cartridges without this license/agreement sold at regular prices are also available. Regular cartridges are also recyclable at no cost through Lexmark Cartridge Collection Program. Lexmark supplies are designed for the highest quality output, page after page. The Lexmark E238 Toner Cartridges work only with the E238 printer and are not compatible with any other Lexmark printers.