These printers use the TK-719 cartridge:

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