This is a set of trombone drain valves with cork plugs, made of durable materials. The trombone water key is easy to install, will not damage your instrument, and is resistant to wear and tear. Features - Color: As shown - Material: Copper nickel, plated cork - Size: 5.90 x 2.80 x 1.00 cm / 2.32 x 1.10 x 0.39 in - Made of high-quality materials, strong and durable, not easily damaged - Suitable for professional trombone, French horn, or large hobbyist accessories - Simple operation, easy to install and replace, ideal replacement for old or damaged parts - Designed for wind instruments, compact size, lightweight, portable, and space-saving for storage - Versatile design fits most trombones available on the market Package list: 1 x Drain valve