The Adore Pro Cello Mute Silencer is made of high-quality rubber, flexible, lightweight and durable. The rubber practice mute mounts well on the two strings (D+G) between the bridge and tailpiece of a Cello. The Cello Mute Silencer is very light and can be carried to anywhere. Just put it on the top of the two middle strings and it's ready to use. The mute should be able to "bounce around" a little. It is frequently used in orchestras since it is easy to put on while playing. When not in use, the mute is near the tailpiece, hooked on to the D or G string. Use Cello Practice Mute to lower the sound level but still keeping it's pitch while maintaining sound quality, that means it would not affect the tone but give the violin a mellow sound. The Black Rubber Cello Practice Mute is suitable for Cello lovers who want to practice anywhere anytime. It would help to cut the sound down so the squeak is tolerable, so you will not disturb others. A small, inexpensive and great accessory for Cello Enthusiasts including beginners, students, and professionals.