Item Type: Embouchure Trainer Material: Copper and silver plating 1The overall use of copper material to build, the surface of silver plating process, enhance the ability to resist corrosion. 2Carries out excellent polishing, so that the surface of the object is bright and the overall appearance is beautiful. 3Pull down to fix the mouth shape, increase the endurance of the mouth muscles, exercise the lip biting force and the concentration of the lip muscles. 4The rubber ring is removable and detachable. Increase the friction of the mouth strength exerciser to prevent it from falling off when held by the hand due to the smooth surface. 5The force at the time of gripping and normal training is the opposite (reaction force). Each 20 seconds can relieve the necrosis of the mouth muscles caused by too much practice, and exercise the endurance of the lip muscles.1 x EmbouchureTrainer