Features: Each light weight and small, easy to store and carry anywhere. Great for you to use when you want to practice playing violin/Cello, but don't want to disturb others. You just need to put the mute on top of the bridge, very convenient. No scratch to your violin/Cello, no damage to the bridge, better than metal type.It can reduce the overtones produced by the strings, give the violin/Cello a smoother, more mellow sound. Application: Suitable for violin or cello. Specifications: Material: Rubber Style: Cello/Violin Color: Black/Yellow/Red/Khaki Cello Style Size: about 6x3.1cm/2.36x1.22inch Violin Style Size: about 1.8x2.7cm/0.71x1.06inch Package Includes: 1Pc Practice Mute silencers note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color of the item.