The Robertshaw 41-408 Hot Surface Ignitor (4-Inch Lead, 271N) is a durable and efficient ignition component designed for gas furnaces, boilers, and other HVAC heating systems. Utilizing advanced silicon carbide technology, it provides reliable and consistent ignition without the need for a pilot light. https://www.partshnc.com/41-408-robertshaw-hotsurfaceignitor271n4-lead