These printers use the KX-FA133 cartridge:
Click On a Printer to View it's Cartridges
          Panasonic Fax KX-F 1000
          Panasonic Fax KX-F 1020
          Panasonic Fax KX-F 1050
          Panasonic Fax KX-F 1070
          Panasonic Fax KX-F 1100
          Panasonic Fax KX-F 1150