Best Brass Trombone Aluminum Warm Up Mute

• Ultra light weight : 60g for 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.