These printers use the C734X20G cartridge:
Click On a Printer to View it's Cartridges
          Lexmark C 734
          Lexmark C 734 DN
          Lexmark C 734 DTN
          Lexmark C 734 DW
          Lexmark C 734 N
          Lexmark C 736
          Lexmark C 736 DN
          Lexmark C 736 DTN
          Lexmark C 736 N
          Lexmark X 734
          Lexmark X 734 DE Color MFP
          Lexmark X 734 DE
          Lexmark X 736
          Lexmark X 736 DE Color MFP
          Lexmark X 736 DE
          Lexmark X 738
          Lexmark X 738 DE Color MFP
          Lexmark X 738 DE
          Lexmark X 738 DTE
          Lexmark XS 736 DE