The ROBERTSHAW Hot Surface Igniter 41-410 Model 271N is a dependable ignition heating system for furnaces, boilers, rooftop heaters, infrared burners, unit heaters, water heaters and many types of HVAC equipment. It is made from high-quality recrystallized silicon carbide to give the igniter its thermal strength and stable electrical properties. It features 3.25 inchL 18-gauge nickel chrome lead wires enclosed in a special high-temperature fiberglass insulation for maximum electrical conductivity. This 120V hot surface igniter reaches the desired temperature within 17 seconds. It is available in a package of one and comes with a user guide for easy installation.