These printers use the ERC-41BK cartridge:
Click On a Printer to View it's Cartridges
          Epson ERC 41
          Epson TM H-6000 III OptionAL ENDORSMENT PTR
          Epson TM H-6000 IV OptionAL ENDORSEMENT
          Epson TM H-6000 II
          Epson TM H-6000 III
          Epson TM-H 6000 ENDORSEMENT PTR
          Epson TM-H 6000 II ENDORSEMENT PTR
          Fujitsu DT 50 II ENDORSEMENT PTR