Description: 【Compatibility】: This flow sensors are designed for NPE (A) series tankless water heaters and is not compatible for NPE (S) series and NTI GF200 series. Please confirm your device model before ordering to ensure it matches 【Sturdy Construction】: Made of quality materials, this tankless water heater sensors are reliable and minimizes the need for frequent replacement 【Enhanced Performance】: The water flow sensor replacement provides accurate and reliable water flow, helping your tankless water heater run efficiently 【Easy to Install】: This water flow sensors are designed to be plug and play and easy to install 【Product Specifications】: The hot water sensor dimensions are 7.1cmx3.9cm/2.80inchx1.54inch and are a single component in the package list Specification: Material:PP Size Chart: 7.1cmx3.9cm/2.80inchx1.54inch Package Includes: 1 Water Flow Sensor Replacement Note: Please allow slightly errors due to manual measurement and different monitors.