Durability: This mouthpiece corrector is made of solid brass with a smooth surface, bright color and elegant appearance Improve your playing skills: Designed to help musicians practice and great their embouchure, this mouthpiece exerciser is ideal for mastering art of brass instrument playing Instrument Accessory: As an accessory for brass instruments, lip practice tool is ideal for beginners and experienced players looking to improve their skills Easy to Install: The mouthpiece exercise can be easily installed directly on your instrument, making it convenient to incorporate it into your daily practice Compact and Portable: This compact lip exercise can be easily put into an instrument case or bag, allowing you to practice Specification: Material:Brass Size Chart: 10cmx3.5cmx3.5cm or 3.94inchx1.38inchx1.38inch Package Includes:1 Trumpet Mouthpiece Exerciser Note: Please allow slightly errors 1-2cm or 0.39-0.79inch differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store