Take a giant leap in longevity by choosing this imaging unit. It delivers standout performance and maximum yield for a true investment in efficiency in your Lexmark B2442dw, B2338dw, MB2338adw, MS321dn, MS421dn, MS421dw, MS521dn, MS521dn, MS621dn, MS622de, MX321adn, MX321adw, MX421ade, MX521de, MX521ade, MX522adhe, MX622ade and MX622adhe. Yield is approximately 60,000 pages based on 5 percent coverage. Imaging unit is designed to work best with Unison Toner that consistently provides outstanding image quality, ensures long-life print system reliability and promotes superior sustainability - all in an innovative, shake-free print system. 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.