Thermopile

2 lead

Spade terminals

257-750 Millivolt

36" long

2 1/8" bulb

Used on various Imperial models such as IF, IF SERIES, IF-25, IF-40-OP, IF-50-OP, IF-75, IF-75-OP, IF-BL SERIES, IF-BL-40, IF-BL-50, IF-COUNTER, IFS-25, IFS-40, IFS-40-OP, IFS-50, IFS-50-OP, IFS-75, IFS-75-OP, IPC-14, IPC-18, IRFS-40, IRFS-50 and only where part is applicable.