Vandoren 5RV Bb Clarinet MouthpieceThe time proven standard for professional musicians. Quality and tradition. This series is available with two different beak versions: Traditional and Profile 88 . The difference between Profile 88 and Traditional mouthpieces is in the exterior angle of the beak. Therefore, the musician is free to choose the model which suits his purpose in terms of best playing position, easiest sound projection, greatest playing comfort, and the most controllable