This Powerbore 604PB mouthpiece is perfect for sousaphones and tubas in need of an exchange style. Made of high-quality silver and brass materials with a nickel and silver plated finish, it is sure to provide a smooth and clear sound. The shank is not included, but it is compatible with various instruments and gear. Ideal for those looking for a reliable and durable mouthpiece, this Powerbore 604PB is a great choice for any musician.

This mouthpieces is a hybrid of a double cup and a single cup mouthpiece.

This mouthpiece design was first introduced by THE TUBA EXCHANGE and now adapt and modify with similar designs by many others.