The Senmubery 10Pcs Water Key, Water Key Spit Valve Cork Pad, designed specifically for trumpet and trombone repair, is an essential accessory. This multi-functional tool set comes in a compact and user-friendly package. The 9mm diameter pad, with a 4mm thickness, provides perfect pressure and grip for any trumpet or trombone, ensuring a smooth and secure repair. Its flexible design allows for easy insertion and removal, making it an ideal tool for repairing joints and valves. The water key, a water-filled element, ensures efficient lubrication during the repair process, reducing the risk of cross-contamination and corrosion. The set also includes a spit valve, a necessary tool for cleaning the instrument effectively. With the Senmubery Water Key Spit Valve Cork Pad Set, you can repair your trumpet or trombone with confidence and precision.