The Conn 62HI in-line independent double rotor bass trombone in the key of Bb/F/Gb features an 9-1/2" professional rose brass bell producing a warm, rich sound. The .562" primary bore combined with the .580" bore open wrap F/Gb attachments offers outstanding clarity and projection with less resistance. The chrome plated nickel silver inner handslide tubes provide the ideal surface for smooth and quick handslide action. The clear lacquer finish adds a subtle warmth to the sound overall. The Conn 62HI professional bass trombone is ideal for both symphonic and solo performance.