Description: Fitment: This 50 PLUS PINS ignitor circuit board is for upgrading older furnaces. Do not fit for DuoTherm 900 series furnaces or furnaces with thermostat in the ground circuit. The normal operation of the board must use the fan control function Material: This ignitor board is made of premium aluminum alloy, wear resistant and durable, and has good sealing performance. Function: The ignition control board is for 12 VDC furnaces, it can shut the fan motor if the board does not sense the flame after the third ignition, avoiding needless cold air blows. Quality: The ignition board is professionally manufactured, has stable performance, has a long service life. Replacement: Direct replacement for your worn, cracked, broken and unusable module board. Size Chart: 12cm/4.72inch Package Includes: 1 Ignitor Circuit Board Note: Please allow slightly errors due to manual measurement and different monitors.