High-yield, Return Program toner cartridge provides exceptional value, reliability and outstanding print quality. Designed for use with Lexmark C524 and C534 printers. Yields 8,000 pages based on 5 percent coverage. 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.