This is trombone drain valves with cork plugs, made of high grade materials, high grade, and durable. The trombone key is easy to install, it will not hurt your trombone, and it will not be easily . Features - Color: Assorted Color - Material: Metal, plastic, wood - Size: About 7.00X2.00X1.00cm/2.75X0.79X0.39in - The design is simple, easy to use, easy to clean and install or remove, and can be cleaned regularly. - craftsmanship, easy to replace, perfect replacement parts for trombone lovers. - Rugged and durable, it can be used for a long time without damage. A good tool for musical instruments. - Protect the music instrument effectively, keeping your trombone always in a good condition. - Suitable for most trombone, with a wide range of applications, which can meet your various needs. Package list: 1 x Drain Valve 1 x Cork Plug 1 x Steel Wire Spring 1 x Base 1 x Gasket 1 x Axle