The product is a Mopar engine coolant recovery tank cap with the manufacturer part number 05156130AA. It weighs 0.1 lb and is designed to fit the Durango Grand Cherokee vehicles. This cap is essential for maintaining the proper function of the engine coolant system, ensuring that the coolant is recycled effectively and preventing leaks. Made by Mopar, a trusted brand in automotive parts, this cap is a reliable and high-quality component for your vehicle.