Our is made of silicone, which is supple and elastic. For those beginners who are trumpet players, it is difficult to control the strength of operating the voice . Our silicone rope can help you practice the manipulation of the voice . Take your trumpet playing to the next level. Features -Color: Black -Material: Silica gel -Size: About 12.00X2.50X0.30cm/4.72X0.98X0.12inch -Silicone is different from other materials. It is not easy to break and is resistant to pulling, which is why it can be used for a long time. -Made of pull-resistant silicone material, it can meet your long-term use needs. -It is small in size and light in weight, whcih makes it easy for you to take along. -You can get this practical set of professional silicone cords at a very good and . -Not only can it be used during practice, its high service level makes it equally suitable for competition or professional playing. Package list: 1 x elastic rope for trumpet