The Robertshaw Carbide Ignitor 41-402 is a specialized furnace igniter designed for use with Robertshaw brand furnaces. This hot surface ignitor model is manufactured by Robertshaw and is specifically designed to provide reliable and efficient ignition for heating systems. With a focus on durability and performance, the 41-402 model is a key component in maintaining the functionality of your furnace, ensuring consistent and effective heating in your home.S-W