Made of rubber Conforms to the shape and curvature of Installs in seconds Easy to change Great for apartments This Round Tourte Style Mute conforms to the shape and curvature of for better contact, greater muting power, and balanced sound. Installs in seconds and is easy to change. Material: Rubber Package contents: 3 x for violin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.