M30 mouthpiece for Bb clarinet that is tuned to A=442 and provides great flexibility with a good balance between timbre and roundness of sound. With its long facing, Profile 88 beak and tip opening of 115 (1/100mm), it provides an impeccable intonation, crisp and accurate articulation, and unrivalled response. This mouthpiece works best with Vandoren #3 to #4 reeds.