These printers use the 72K1XK0 cartridge:
Click On a Printer to View it's Cartridges
          Lexmark CS 820 DE
          Lexmark CS 820 DTE
          Lexmark CS 820 DTFE
          Lexmark CX 820 DE
          Lexmark CX 820 DTFE
          Lexmark CX 825 DE
          Lexmark CX 825 DTE
          Lexmark CX 825 DTFE
          Lexmark CX 860 DE
          Lexmark CX 860 DTE
          Lexmark CX 860 DTFE