Kind reminder: Hello dear customer! Before purchasing our product, please consider whether your product model and appearance are consistent with ours. This can greatly enhance your shopping experience and reduce the possibility of returns Long term energy saving: Our products have low energy consumption operation, increasing usage time and lifespan, reducing maintenance costs, allowing you to buy with peace of mind and use with peace of mind Product quality: Our products are made of high-quality materials that , friction resistant, durable, and have multiple advantages Long term energy saving: Our products have low energy consumption operation, increasing usage time and lifespan, reducing maintenance costs, allowing you to buy with peace of mind and use with peace of mind After sales guarantee: Dear customer! If the product you receive has defects or any problems, you can contact us and send pictures of the product defects. We will reply to you within 24 hours and give you a satisfactory a Our PH-20154 is a premium quality thermocouple replacement for pellet stove models. This listing includes the correct ceramic thermocouple cover tube for the models specified, factory part number 812-1322. This thermocouple measures 14″ in length replacing factory part number 812-4470. The thermocouple is the device over the burnpot that is sensing proof of fire during start-up allowing the stove to go into normal operation mode. The ceramic cover must be in place over the thermocouple during operation. As the thermocouple cover is ceramic, we recommend using caution when handling, and cleaning it with a dry paint-brush when needed.