1、The overall use of copper material to build, the surface of silver plating process, enhance the ability to resist corrosion, durability and service life. 2、Carries out excellent polishing, so that the surface of the object is bright and the overall appearance is beautiful. 3、Pull 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. 4、Made with exquisite craftsmanship, high quality and professional production, which can help you practice well and become more excellent. 5、The trombone mouthpiece simulator is very suitable for intermediate and advanced players, which can meet your needs and promote your musical performance. 1 x Trombone Mouthpiece Trainer Item Type: Trombone Mouthpiece TrainerMaterial: Cooper and Silver Plated