Andoer Trumpet Straight Mute Sourdine Aluminum Alloy Silver Color Suitable for all type trumpets. Very useful when you feel like playing your mute in the middle of the night. With sound quality, intonation in all dynamic ranges and superb workmanship. It produces the type of sound that is considered the "standard" in cup mutes, for most jazz musicians. Made of excellent Aluminum alloy, durable for use.