Schilke MOST 1-CR Cornet, Mouthpiece for cornet, Signature Series, Inner cup diameter: 17.43 mm, 22 backbore, Silver-plated, Full and clear sound with excellent evenness over the whole range and in every dynamic range, Equipped with a standard cup depth and the MOST-A1 signature backbore, The mouthpiece rim was specially designed for Osamu Takahashi and Toshio Tanaka and lies between rim shape #3 and the semi-flat rim shape #4 in terms of contour and grip