These printers use the C5240MH cartridge:
Click On a Printer to View it's Cartridges
          Lexmark C 524
          Lexmark C 524 DN
          Lexmark C 524 DTN
          Lexmark C 524 N
          Lexmark C 524 TN
          Lexmark C 534
          Lexmark C 534 DN
          Lexmark C 534 DTN
          Lexmark C 534 N