Bach mouthpieces are designed to meet every conceivable playing need and have been for nearly three quarters of a century. A Bach mouthpiece will make a poor instrument play well, a good instrument play better. Volume and excellent intonation, ease of response in the high and low register, rich, uniform timbre throughout the range, and resistance calculated to increase the player's endurance - these characteristics explain why the best professional artists choose Bach. Features: Medium cup depth 17.60 mm cup diameter Narrow rim shape. A large mouthpiece for great volume of tone, especially in the low register