Panasonic High Yield Black Toner Cartridge Panasonic PANKXFA83 – Toner cartridge is designed specifically for use with the Panasonic KXFL511, KXFL541, KXFLM621, KXFLM651, KXFLM661 and KXFLM671. Toner cartridge yields up to 2,500 pages.. Panasonic