Made of , it is flexible and durable to use. Cello Practice Mute is easy to use and operate. Will not scratch your violoncello and violoncello bridge. It will provide convenience in dampening violoncello practice volume without affecting the tone. Features -Color:Black -Material:Metal - Size: 7.05X3.48X1.99cm/2.77X1.37X0.78in -Take seconds to fit it on the bridge for violoncello. Will not scratch violoncello and cello bridge. -Moreover, during use, only the front volume is changed without changing the sound quality of the violoncello. -The violoncello mute is made of premium metal material, which is light, durable and flexible, and will not cause damage . -This cello mute is a practical and perfect accessory for beginner to practice violoncello. -It can be given as a gift to your friends who are studying cello, they will be very happy. Package list: 1 x cello mute