Schilke Signature Series MG1 SP Trumpet Mouthpiece -Model supervised by silky artist Mark Gujon- This trumpet mouthpiece was designed by Marc Gujon, a Silky Artist, principal trumpeter at the Paris Opera, and professor at the Paris Conservatoire. Marc is one of the world's leading soloists from France, and, along with Atsushi Takahashi (Principal Trumpeter of the Tokyo Symphony Orchestra) and Toshio Tanaka (Yomiuri Nippon Symphony Orchestra), he has been involved in the development of the Silky Trumpet "HD Series" and "Soloist Series." The rim of the Mark Gujon "MG1" features a semi-rounded contour and inner edge, specially developed for Mark. This unique shape provides comfort and flexibility. The combination of the 25 throat size and original backbore produces a unique tone full of warmth and color, with a comfortable, open feel. This mouthpiece is suitable for a wide range of performances, including solo, ensemble, and orchestral performances. Rim inner diameter: 17.43mm Throat: 25 *Please note that there may be small scratches due to manufacturing.