The product is a coolant overflow tank reservoir for Honda GL1500 Goldwing motorcycles from 1988 to 2000. This part is essential for regulating the coolant level in the engine and preventing overheating. It is a genuine Honda product designed specifically for this model, ensuring a perfect fit and optimal performance. Made to last, this overflow tank reservoir is a reliable component for maintaining the engine cooling system of your Honda Goldwing. No cap for the tank is included.