Return Program toner cartridge provides exceptional value, reliability and outstanding print quality. Designed for use with the Lexmark C522, C522N, C524, C524DN, C524DTN, C524N, C524TN, C530DN, C532DN, C532N, C534DN, C534DTN, C534N and C53X. 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.