Mr. Heater Flame Sensor Kit for All Kerosene Forced Air Heaters Fits the following heaters - 2003 models - Current MR. HEATER - MH50KT; MH75KT; MH125KT; MH175KT Fits the following heaters - 2003 models - Current - HEATSTAR - HS50KT; HS75KT; HS125KT; HS175KT Fits the following heaters - 2003 models - Current - ALL PRO - SPC-K50; SPC-K100; SPC-K150 Fits the following heaters - 2003 models - Current UNIVERSAL - K50-FA; K100-FA; K150-FA