15mm Thread T Piece Temp Adapter 34mm Inner Diameter Water Temperature Radiator Hose Gauge Joint Pipe 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.