Yacht Car / Mouthpiece for Horn - Stefan Dohr Model 2EMSD Cup Inner Diameter: 17.5 Cup Depth: Depth between 2DM and 2EM [2E/DM4.2] is the same specification as the mouthpiece used by Stefan Dohr, principal horn player of the Berlin Philharmonic. The base is the EX model. Although it says 2E/DM 4.2mm, the depth is between 2DM and 2EM. Throat: 4.2mm. ARB (Old Backbore/Old Rim) JK can be used for both American and European horns. Description from Lemante Brass. Used for about a year, so there are some scratches on the shank, but the condition is relatively good. The outer box has been disposed of, so it cannot be included. Thank you for your understanding. Immediate purchase is possible. If you have any questions, please feel free to comment.