The Traditional M15 is part of the industry-standard clarinet-mouthpiece range from Vandoren, and has a traditional beak design.
The difference between Traditional and Profile 88 mouthpieces is in the exterior angle of the beak. The musician is free to choose the model which suits his or her purpose in terms of best playing position, easiest sound projection, greatest playing comfort, and the most controllable and precise articulation.
The M15 allows ease of articulation and offers musicians a broad spectrum of sound. It has a 103.5 (1/100 mm) tip opening and a long facing length.