Features: 1) Toner cartridge compatible with following fax machines: a) Panasonic fax machine: i) Model KX-FA76A: for use in KX-FL501, KX-FL502, KX-FL503, KX-FL523, KX-FLM551, KX-FL552, KX-FL553 and KX-FL13751 / 752 / 753 / 755 / 756 / 758 ii) Model KX-FA83E: for use in KX-FL511, KX-FL512 and..