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 for 250/750 millivolt self-generation control systems.a. Internal (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 inchType: Gas Water Heater PartsMaterial: coppercolor:picture colorFeatures: corrosion , high temperature resistanceApplicable gas: natural gas / liquefied petroleum gasApplication areas: gas ovens, gas grills, gas boilers, gas water heaters, etc.Package Contents:5 * thermopileOnly the above package content, other products are not included.Note: Light 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.