Lexmark 56F1U00 Ultra High Yield Black Toner Cartridge is designed to perform in the Lexmark MS521dn, MS621dn, MS622de, MX521de, MX521ade, MX522adhe, MX622ade, MX622adhe
Premium Compatible 56F1U00 Ultra High Yield Black Toner Cartridge fully compatible with the Lexmark MS521dn, MS621dn, MS622de, MX521de, MX521ade, MX522adhe, MX622ade, MX622adhe. The use of compatible supplies does not void your printer warranty.