This Q-Connect Lexmark 56F2U00 compatible black toner cartridge can be relied on to produce even coverage and a high gloss finish. The Q-Connect compatible toner cartridge will provide accurate and detailed printing of the highest quality, easy to install with an impressive high page yield per cartridge. Compatible with Lexmark MS521dn, MS621dn, MS622de, MX521ade, MX521de, MX522adhe, MX622ade, MX622adhe.