These printers use the X651H21A cartridge:
Click On a Printer to View it's Cartridges
          Lexmark X 651
          Lexmark X 651 DE MFP
          Lexmark X 651 DE
          Lexmark X 652 DE MFP
          Lexmark X 652 DE
          Lexmark X 654
          Lexmark X 654 DE MFP
          Lexmark X 654 DE
          Lexmark X 654 E
          Lexmark X 656
          Lexmark X 656 DE MFP
          Lexmark X 656 DTE MFP
          Lexmark X 656 DE
          Lexmark X 656 DTE
          Lexmark X 656 E
          Lexmark X 658
          Lexmark X 658 DE MFP
          Lexmark X 658 DFE MFP
          Lexmark X 658 DME MFP
          Lexmark X 658 DTE MFP
          Lexmark X 658 DTFE MFP
          Lexmark X 658 DTME MFP
          Lexmark X 658 DE
          Lexmark X 658 DFE
          Lexmark X 658 DME
          Lexmark X 658 DTE
          Lexmark X 658 DTFE
          Lexmark X 658 DTME
          Lexmark X 658 E
          Lexmark XS 651 DE
          Lexmark XS 654 MFP
          Lexmark XS 658 DME