Fujikura ELCT1-25 Replacement Electrodes are for use with the Fujikura FSM-45PM, FSM-45F, FSM-40PM, FSM-40F, FSM-40S,FSM-40S-B FSM-30S, FSM-20PMII, FSM-20PM, FSM-20CSII, FSM-20CS, FSM-20C optical fiber fusion splicer.