Welcome to our store. Our store has a variety of high-quality household appliances and accessories, please feel free to choose and buy. If you want to work with us for a long time, please contact us and we will give you a very favorable price.Best Regards! Specifications: The thermopile is used with 750 millivolt pilot systems. This system is generally found on gas fireplaces and gas logs that use wall switches or remote controls. This equipment is a kind of cobination type thermocouple, provides power for 250/750 millivolt self-generation control systems. a. Internal resistance (25C), varies with specifications and length between 1,500 m and 4,500 m. b. Normal working temperature 700-750C. c. Connecting type: spiral type and two-pole plug-in type. d. Length 36 inch Type: Gas Water Heater Parts Material: copper color:picture color Features: corrosion resistance, high temperature resistanceApplicable gas: natural gas / liquefied petroleum gasApplication areas: gas ovens, gas grills, gas boilers, gas water heaters, etc. Package Contents: 15 x thermopile Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.