Best Brass Trumpet Aluminum Warm Up Mute

Ultra light weight : 40g.
Portable : less showed part from the bell.
Well balanced sound with highest level of sound.
Nominal level : -30dB as same as e-Brass. you can blow anytime, anywhere.
You can warm up at backstage or beside stage where you can not blow in loud.
Fit tight to the bell.
Simple structure : no need for battery or electrical device.
Convenience for all trumpet players from beginners to professional players.
For Bb and C trumpet including cornet.