Clarinet mouthpiece

In a mouthpiece for a clarinet which includes a tip, a face extending inwardly from the tip, an opening in the face adjacent of the tip and a longitudinal bore communicating with the opening, and wherein the face is arcuately curved downwardly toward the tip with such curvature being defined by a set of four facing numbers as read from an "ERICK BRAND" measuring glass which numbers indicate the gap distance between the face and a reed which may be selectively mounted to the mouthpiece in overlying relationship to the opening and the tip of approximately 0.038 mm, 0.254 mm, 0.508 mm and 0.559 mm, respectively, the improvement comprising, said facing numbers being approximately 38, 26, 16, 10 respectively, said bore having an inner end and an outer end, the length of said bore between such inner and outer end being approximately 52.705 mm, and said inner end including a pair of inwardly extending and vertically oriented side walls, and side walls being inclined outwardly from top to bottom.