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 strengthen their embouchure, this mouthpiece exerciser is ideal for mastering the art of brass instrument playing Instrument accessory: As an accessory for brass instruments, the lip practice tool is ideal for beginners and experienced players looking to improve their skills Easy to install: The mouthpiece exerciser can be easily attached directly to your instrument, making it convenient to incorporate into your daily practice Compact and portable: This compact lip exerciser can be easily stored in an instrument case or bag, allowing you to practice anywhere Specification: Material: Brass Size: 10cm x 3.5cm x 3.5cm / 3.94 inch x 1.38 inch x 1.38 inch Package includes: 1 x Trumpet mouthpiece exerciser Note: Please allow slight measurement deviations of 1-2cm / 0.39-0.79 inch due to manual measurement