Proflow Water Temperature Sensor Adapter, 38mm (1.50''), 1/8 in. NPT Port, Billet Aluminium, Black Anodised - PFEIRTABKPart Number: PFEIRTABK Proflow's water temperature sensor adapters are designed to allow you to place the water temperature sensor directly in the path of the water to the radiator, ensuring the most accurate reading possible. They are manufactured from high quality aluminium and come in your choice of black or silver anodised finishes. The adapters all feature a 1 8" NPT female threaded bung for the direct thread in attachment of your water