40mm Powder Coated Aluminum Water Temperature Sensor Adapter Kit (Red) Universal Application For 40MM Radiator & Water Temperature Sensor Made From High Quality & Light-Weight Aluminum Surface With Anodized Finish To Improve Strength & Durability Fits Sensors In 1/8 NPT Port Diameter: 40mm (1.57 Inch). Sensor Port Diameter: 6AN. Sensor Port Thread Pitch: 1/8 NPT