Features: Can reduce volume, and will not significantly change the erhu feel. Weaken the voice and practice erhu without disturbing others. A great gift for Chinese erhu lovers. Easy to install and remove, easy switch between normal and silent. It's very easy to use, just clip it to the bridge. Suitable for all kinds of bridges. Specifications: Condition: Material: rubber Color: Coffee Weight: approx. 2g Package List: 1 x Erhu Tone Filter 1,Can reduce volume, and will not significantly change the erhu feel. 2,Weaken the voice and practice erhu without disturbing others. 3,A great gift for Chinese erhu lovers. 4,Easy to install and remove, easy switch between normal and silent. 5,It's very easy to use, just clip it to the bridge. Suitable for all kinds of bridges?. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.