This is a practice mute for PIANISSIMO. Retail price: 4,950 yen. Used only 2-3 times and then stored at home. Please refrain from purchasing if you are sensitive to used items. It attaches to the bridge with an internal magnet, so there's no worry of it loosening or falling off during practice. The entire mute is covered in rubber, so it won't damage the instrument or bridge. It combines the advantages of both metal and rubber, with minimal loss of sound quality and sufficient muting effect. It's the wrap-around type, not the kind that sits on top of the bridge, so the contact point between the bow and strings is easy to see, making it recommended for beginners. You can adjust the muting effect by changing the top and bottom position when attaching it. It folds up very compactly.