Vandoren Optimum Mouthpiece For Alto SaxophoneThe favorite of classical saxophonists. The conception of this series was the fruit of research on both external shape (particularly the beak) and sound, in order to meet the needs of todays saxo phone players. This series is available for: alto saxophone AL3: With its exceptional roundness, the ultimate classical mouthpiece. alto saxophone AL4: A little more open than the AL3, while maintaining the sound aesthetic of the OPTIMUM series. alto