The URO Parts Windshield Wiper Arm Nut Cover - 012768 is a small plastic cover that fits over the nut that secures the windshield wiper arm to the vehicle. This cover helps to protect the nut from dirt, debris, and moisture, which can cause corrosion and damage. It is designed to be a direct replacement for the original nut cover and is made from high-quality materials for durability and longevity. This product is compatible with various makes and models of vehicles and is easy to install. It is an essential component for maintaining the proper functioning of the windshield wiper system.