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Keep your furnace running smoothly with the Honeywell Thermocouple 18 In . Designed to accurately sense flame and gas temperature in LP/NG systems, this replacement thermocouple is made from high-quality materials to ensure long-lasting performance. The standard coaxial design is compatible with most heating systems, making it an ideal choice for homeowners and HVAC professionals alike. Easy to install and maintain, the Honeywell Thermocouple 18 In delivers consistent performance that keeps your home warm and comfortable all winter long. Order yours today from our Patriotic Veteran-Owned Business and experience the best in heating comfort.