DescriptionOur water gate key has all the advantages of high grade trombone water gate key parts, durable and easy to use. It fits most models of trombone, so you don't have to worry about it. It is a professional tool for music lovers.Features-Material: Copper, cork-It is made of copper and cork material to ensure its durability and popularity.-Rugged and durable, it can be used for a long time without damage. It is a good helper for musical instruments.-The user-friendly and exquisite design is enough for you to use it for a long time.-The design is simple, easy to use, easy to clean and install, and can be cleaned regularly.-It is made of carefully selected high grade materials, not easy to deform, and will accompany you for a long time.