Mouthpiece Strength Trainer, Easy Installation, Coating, Trombone, Pressure Relief Valve, Good Comfort for Wind Instruments (Gold)

Brass material: this relief valve is made of excellent brass and ensures good durability and reliability, corrosion resistance and wear resistance. Ability correction: can help trombonists correct wrong mouth posture and techniques and improve sound quality and playing techniques. PRESSURE RELIEF This valve can help the performer reduce mouth pressure when playing trombone, improve comfort and control performance. Good comfort: thanks to its ergonomic design, this pressure reducing valve can effectively reduce discomfort in the mouth and face during performance. Easy to use: this relief valve is suitable for various trombone models, easy to install and adjust and suitable for artists of all levels.