These printers use the 74C1SC0 cartridge:
Click On a Printer to View it's Cartridges
          Lexmark CS 720
          Lexmark CS 720 DE
          Lexmark CS 720 DTE
          Lexmark CS 725
          Lexmark CS 725 DE
          Lexmark CS 725 DTE
          Lexmark CX 725
          Lexmark CX 725 DE
          Lexmark CX 725 DHE
          Lexmark CX 725 DTHE