What is a 2B trombone?

A 2B trombone is a type of trombone that is commonly used by intermediate to advanced players. It is larger than the 1B trombone, which is typically played by beginners, but smaller than the 3B trombone, which is used by professional players. The 2B trombone has a bore size of .500-.525 inches and a bell diameter of 8 inches. It is usually made of brass and has a nickel-plated or silver-plated finish. The 2B trombone is known for its versatility and is used in a variety of genres of music, including jazz, classical, and pop.