The new Artisan Trombone Collection is the newest and most exciting development in Bach Stradivarius professional trombones. The new A47BO is a completely modular system allowing each player to customize the Artisan trombone to meet their own playing needs. This valve design offers just the right amount of resistance required for the demands of symphonic and soloist work. The 8-1/2" one-piece hand-hammered yellow brass Bach Artisan bell will define the symphonic sound for generations. The .547" large bore combined with the rotor valve and open wrap F attachment offers a warm sound, great projection, and an efficient feel. The new reverse main tuning slide construction offers an more open response. 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 Bach Stradivarius A47BO professional trombone is ideal for both symphonic and solo performance.