This is a vintage Berg Larson Bullet Chamber SMS hard rubber soprano sax mouthpiece. The piece is stamped with a 75/0 marking, which translates into a .075” tip opening, and a small interior chamber. The 0 chamber produces a bright and rich tone with great projection. This piece has some scratching along its left exterior, but looks good where it counts, as its tip, side rails, and interior chamber are all in great shape. A unique vintage player with definite power and focus, this mouthpiece has a great sound with lots of body.