Practice mouth strength and fix mouth shape. Use both ends, pull one end, exercise lip biting force and lip muscle strength concentration. One is like holding a pencil for 10-20 seconds at a time. Exercise lip muscle endurance. The eloquence exercises of trombones, horns and saxophones are also applicable. Horn friend, the latest information that students give back is to for a few minutes with this drill before blowing the trumpet, playing in fine condition. This trumpet mouth exerciser, according to the principle of trumpet mouth and breath forward, lip concentration and mouth closing, avoids pulling out the corners of the lips and lips, practices gums, teeth close, teeth alignment, lips parallel, while vigorously practicing, corrects the mouth shape and breath. [Suitable for]Trumpet,Trombones,Clarinet, Horns and Saxophones are also applicable Specification: Item weight: 32g / 1.1ounce Colour:Silver Material:Stainless steel Size:6.5cm Package Contents: 1 * Mouth Strength Trainer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.