These printers use the TK-719 cartridge:
Click On a Printer to View it's Cartridges
          Royal-Copystar CS 3050
          Royal-Copystar CS 4050
          Royal-Copystar CS 5050
          Kyocera KM 3050
          Kyocera KM 4050
          Kyocera KM 5050
          Kyocera-Mita KM 3050
          Kyocera-Mita KM 4050
          Kyocera-Mita KM 5050