Features: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 warm up 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 forTrumpet,Trombones,Clarinet, Horns and Saxophones are also applicable Specification:Material: Stainless steelColor: SilverItem size: 65 * 20 * 10mm / 2.6 * 0.8 * 0.4inItem weight: 32g / 1.1ouncePackage size: 90 * 30 * 30mm / 3.5 * 1.2 * 1.2inPackage weight: 38g / 1.4ounce Package Includes:1 * Mouth Strength Trainer Note: The data are all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.