B46 mouthpiece for Bb clarinet that was designed by Robert Van Doren and provides time proven standard for musicians worldwide. With its medium facing, Profile 88 beak and tip opening of 117+ (1/100mm), it provides an impeccable intonation, crisp and accurate articulation, and unrivalled response. This mouthpiece is best suited to musicians playing clarinet and saxophone, and works best with Vandoren #2.5 to #3.5 reeds.