Features: The purpose of using it is to make sound made by the Violins lighter when practicing, during the use. Make of soft rubber metal, light and durability, easy to carry and operate, will not harm to the Violins. It only changes the volumes of sound of the Violins (tone remain the same), but not the quality of sound of the Violins (intonation remain the same). Excellent to practicing the Violins when you don't want to disturb your family or neighboorhoods. Easy to install/remove. Small and light, very convenient to carry. Suitable for Violins and small Violas. Specifications: Material: Rubber Metal Color: Black/Redness/Yellow/Blue Size: 5.2x2.2cm/2.05x0.87inch Package Includes: 1x Violins Mute Silence note: Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.