This is a professional tenor trombone made in Eastlake, Ohio, USA. The 3B is one of the larger bore King straight trombones, the classic sound of J.J. Johnson and many other great players. The large 8" bell and .509" hand slide gives it a more open blow with less resistance than the 2B models and a broader tone with less edge. The all nickel slide gives clarity of tone, and resists corrosion and dents.
With a larger mouthpiece this is an excellent concert band and pops instrument; with a smaller mouthpiece it's a nimble bebop horn. When you need blasty for Latin, no problem.
The modern King features a vintage 3-piece balance weight for style, and a new faux-carbon case for extra style and secure storage.