New-Stone-Lined Mute ST-178 for Bass-Trombone, Mannie Klein Practise Mute

New-Stone-Lined Mute ST-178 for Bass-Trombone, Mannie Klein Practise Mute The ST-178 from New-Stone-Lined is the main Practice Mute model for the bass-trombone. Despite with the increase in resistance this mute enables free and easy blowing. Musicians are now able to practice in a hotel room, warm up before a gig without disturbing anyone.