High-yield toner cartridge is designed for use with the Lexmark T630, T632 and T634 series laser printers. Toner delivers outstanding results page after page, year after year. Superior Lexmark design means precision pairing between printer and cartridge for value, quality and environmental responsibility you can count on. Lexmark Return Program Cartridges are sold at a discount vs. 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. Cartridge yields approximately 21,000 pages.