These printers use the ERC43 cartridge:
Click On a Printer to View it's Cartridges
          Epson TM H-6000 IV ENDORSEMENT PTR
          Epson TM U-120
          Epson TM-H 2000
          Epson TM-H 2000 IV
          Epson TM-U 310
          Epson TM-U 311
          Epson TM-U 320