Lexmark Return Program Cartridges are sold at a discount versus the prices of regular cartridges in exchange for the customers 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.Average Cartridge Yield 3500 standard pages. Declared yield value in accordance with ISO/IEC 19752.- True: Accurate technology. Genuine quality. Environmental focus. It's our nature.- Image: Crisp print. Professional documents. Great Impressions. Project your character.- Always: Dependable. Page after page. Year after year. Count on Lexmark.