My Mute Cello Silencer

Purchased but barely used.
Comes in its original box.

From the manufacturer's website:
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My Mute (TM) reduces the sound volume to approximately 1/5 of the original sound. By attaching the large mass weight = My Mute (TM) to the top of the bridge, which is one end of the string's vibration, the top of the bridge becomes less prone to vibration due to the mass effect of the weight (law of inertia). This significantly reduces the vibration transmitted to the top and back plates, thus achieving sound muting. Please rest assured that the bridge will not vibrate abnormally, nor will the weight's vibration cause the bridge to move.
*While My Mute (TM) provides a significant muting effect, it does not completely silence the instrument. Please play with consideration for your neighbors.
The world's first screw-on type

Easy and secure attachment prevents it from falling off during performance. When securely fixed with screws, it will not fall off even if the instrument is turned upside down. Unlike comb-type mutes and silencers that are pushed onto the bridge for attachment, this mute can be attached and detached without damaging the bridge.