These printers use the 4K00199 cartridge:
Click On a Printer to View it's Cartridges
          Lexmark Optra M-410
          Lexmark Optra M-410 N Solaris
          Lexmark Optra M-410 Series
          Lexmark Optra M-412
          Lexmark Optra M-412 N Solaris
          Lexmark Optra M-412 Series
          Lexmark Optra M-4045
          Burroughs-Unisys UDS 12
          Burroughs-Unisys UDS 17
          Burroughs-Unisys USD 12
          Burroughs-Unisys USD 17