The Robertshaw 41-400 Series Norton Hot Surface Ignitors deliver dependable ignition in heating systems of every description. From furnaces and boilers to rooftop heaters, infrared burners, unit heaters, water heaters and many other types of HVAC equipment. The 41-400 Series Hot Surface Ignitors are made of high-purity recrystallized silicon carbide (Crystarâ„¢) which combines physical and thermal strength with stable electrical properties. The 41-400 Series are designed to reach ignition temperature(s) within 17 seconds. They have 18-gauge nickel chrome lead wires embedded and metalized in place for maximum holding strength and electrical conductivity. The lead wires are also enclosed with a special high-temperature fiberglass insulation providing total electrical protection. NOTE: All 41-400 series ignitors are 120 VAC models. Some hot surface modules are rated for 208/240 volts input, however they step the voltage to ignitor down to 120 VAC. Replaces: AMANA B340039P01 Functional BARNETT BRASS 661929 Functional EATON FI-408 Functional JOHNSTONE SUPPLY L37-815 Exact JOHNSTONE SUPPLY L37-815 Functional LENNOX INDUSTRIES 98P78 Functional LENNOX INDUSTRIES 98P78 Exact NORTON 271N Functional NORTON MB457025 Exact NORTON MB478266 Exact REPAIR CLINIC 552037 Functional RHEEM 62-22441-01 Exact RHEEM 62-22668-93 Functional STARLITE 11120-100-1408 Functional SUPCO SIG-408 Functional TRANE IGN-0034 Exact TRANE IGN34 Exact UNI-LINE 63473 Exact Uni-Line UPC number. Number may appear preceded by Uni-Line's vendor i.d. number, 662013.ex. 66201312345. UNKNOWN 98P7801 Functional W.W. GRAINGER 1TGF3 Exact WHIRLPOOL 99794328 Exact WHITE-RODGERS 767A-372 Functional