Supco hot surface ignition furnace ignitor stock number ig418 this igniter is a replacement for goodman numbers b1401015, b140108s and modine number 5h075032b. The ignitor’s ceramic base measures 1-5/16in wide and 1/2in thick. The wire leads measure 5-1/2in long, with connector. Metal mounting bracket attached holes measure 1-1/4in center to center.