These printers use the KX-FA83 cartridge:
Click On a Printer to View it's Cartridges
          Panasonic KX-FL 511
          Panasonic KX-FL 512
          Panasonic KX-FL 513
          Panasonic KX-FL 540
          Panasonic KX-FL 541
          Panasonic KX-FL 542
          Panasonic KX-FL 543
          Panasonic KX-FL 611
          Panasonic KX-FL 612
          Panasonic KX-FL 613
          Panasonic KX FLM 651
          Panasonic KX FLM 661
          Panasonic KX FLM 671