Features: Ensures uninterrupted hot water flow with our 100112328 21" Thermopile Assembly, 750 millivolt replacement kit designed to restore your gas water heater's performances. Crafted from nickel, copper, and stainless steel, this thermopile assembly boasts corrosion resistance and high temperature endurances for long lasting use. Suitable for homeowners and maintenance professionals seeking solution for repairing Water Heaters. Suitable for various settings, this thermopile kit is perfect for residential homes, hotels, and commercial establishments where continuous hot water supply is essential. With its easy installation process and compatibility with multiple brands, our thermopile assembly kit ensures that your water heater operates efficiently, keep you in comfort without any hassle. Specifications: Component:Nickel+Copper+Stainless Steel Size:Approx.710mm/27.95inch Package Includes: 1 Set Thermal Reactor note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.