5JB mouthpiece for Bb clarinet that is also called “the jazz” mouthpiece was designed by Robert Van Doren and provides time proven standard for musicians worldwide. With its long facing, Profile 88 beak and tip opening of 147 (1/100mm), it provides an impeccable intonation, crisp and accurate articulation, and unrivalled response. This mouthpiece works best with Vandoren #1.5 to #2.5 reeds.Made in: FranceFacing Length: LTip Opening: 1,47 mm