It is a beautiful mute, and it does a great job in performance, but The rim of the cup, the little black edge, comes off sometimes

It does a good job of stifling the sound, but the pitch changes more than on the Yamaha Silent Brass system mute which I have been using.

This did an amazing job at quieting my daughters practice

A bit hard to blow but does a really good job.

The mute does a good job of reducing the trumpet's volume

Does a good job.