1Reliable Material: This adapter is made of Abs and copper material, which improves oxidation resistance and high temperature resistance. The inner core is made of pure copper, which greatly improves the electrical conductivity. 2Features: Trailer plug adapter is well sealed with spring cover, dustproof and waterproof when not in use, prolonging service life. 3Easy Install: Easy to install, comes with mounting brackets, screws and nuts, just find the correct mounting position and tighten the nuts for a successful installation. 4Excellent Performance: Professional manufacturing, exquisite workmanship, high accuracy, stable performance and high reliability. 5Fully Equipped: This adapter kit comes complete parts, so you don't have to worry about losing parts and not finding replacements.