Best Brass

* Ultra light weight : 75g for bass trombone.
* 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 battery or electrical device.
* Convenience for all trombone players from beginners to professional players.
* Possible to use for flugelhorn with trombone warm-up.