This part works for connecting the overflow hose to aluminum radiators, an essencial one to replace the broken/missing radiator overflow nipple. Made of high-quality aluminum, engineered for optimum fit and function Overflow Nipple Thread: NPT 1/16" Diameter of Barb: 8mm/0.31", Overall Length: 35mm/1.38" Includes 1x Radiator Overflow Nipple Barb Fitting, Weight: 0.09 pounds, Manufacturer: ‎Mysttoo Worldcross