Features The Bach 42 trombone features an 8-1/2" one-piece hand-hammered yellow brass bell that has defined the symphonic sound for generations. The .547" large bore offers outstanding clarity and projection. 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 42 professional trombone is ideal for both symphonic and solo performance. Description Product Description Bach Stradivarius 42 Series trombones deliver a large symphonic sound that projects without distortion. Large bore (.547") straight trombone.