microMICR Alternative Lexmark MS321 MICR Imaging UnitElevate your Lexmark printing with a dedicated MICR imaging solution that blends reliability, security, and cost efficiency. The microMICR Alternative Lexmark MS321 MICR Imaging Unit is engineered as a high performance imaging unit paired with a specially formulated MICR toner designed for Lexmark MS321, MS421, MS521, MS621, MS622, MX321, MX421, MX521, MX522, and MX622. This replacement unit preserves the integrity of the printers core components