These printers use the T650H21A cartridge:
Click On a Printer to View it's Cartridges
          Lexmark T 650
          Lexmark T 650 DN
          Lexmark T 650 DTN
          Lexmark T 650 N
          Lexmark T 652
          Lexmark T 652 DN
          Lexmark T 652 DTN
          Lexmark T 652 N
          Lexmark T 654
          Lexmark T 654 DN
          Lexmark T 654 DTN
          Lexmark T 654 N
          Lexmark T 656 DNE
          Lexmark TS 654 DN
          Lexmark TS 656 DNE