Trombone Bach Stradivarius 42BThe Bach 42BG trombone features an 8 1 2" one piece hand hammered gold brass bell that has defined the symphonic sound for generations. The . 547" large bore combined with the traditional wrap F attachment offers outstanding clarity and projection with just the right amount of 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