These billet aluminum adapters are designed to provide an easy way to tap into a 1-1/4 inch or 1-3/4 inch I.D. hose. They features a 1/4 NPT threaded hole that can accept a variety of fittings and adapters. Overall length is 2.50 inches. Bright-dipped R5 and anodized green for superior resistance to engine coolant, fuel, and oil.