Feature: 1. Function: This 15mm thread water sender adapter is the ideal accessory for, which allow installation of temperature gauge by tapping into a coolant hose. 2. Practical: Used as a port in the intake manifold or water pump without a sensor to mount, it is convenient to add an auxiliary water thermometer or fan control kit. 3. High Precision: Accurately gauge the temperature of the water, preventing overheat and diagnosing the potential problems for vehicles in time. 4. Parameter: The inner diameter of the tube is 34mm, the thread size is 15mm, it is made of high strength metal alloy material, which is hard, and it is not easy to wear or rust. 5. Easy Installation: Comes with one metal alloy water temperature gauge adaptor and two hose clamps to fit your car, which is rasy to install. Specification: Item Type: Temperature Hose Gauge Joint PipeMaterial: Metal alloyThread Size: Approx. 15mm/0.59in Tube Inner Diameter: Approx. 34mm/1.34inFitment:Universal fit for most carsInstallation:To install the adapter, you simply cut your radiator hose in the location where you want to mount the adapter, slip it in place, and use the supplied hose clamps to tighten it down. Your temperature sensor screws into the threaded port. You will need to consult the documentation for the sensor you are using to determine if it requires a ground or not. Some sensors provide their own ground - these usually have two or more wires. Other sensors get their ground through the body of the sensor itself - these usually only have one wire. If a sensor does not provide its own ground, you will need to provide it with one by connecting a wire between the sensor (or the adapter) and a convenient ground source such as a bolt on your engine. If a ground is necessary, you can use the provided grounding screw. A quick disconnect for the ground is also included. . Package List: 1 x Temperature Sensor Adapter2 x Clamp Note: Coolant does not flow through the radiator hose until the thermostat is turned on. Thus, the sensor installed in the upper radiator hose will read the temperature under the hood until the thermostat is turned on, at which point it will begin to read the engine coolant temperature.