W. Chr. Schmidt Bass Trombone Mouthpiece USA 1-1/4G Large shank, silver plated SP ◆ Rim inner diameter: 28.0mm ◆ Throat diameter: 7.0mm Can be used with a standard large shank ★ I purchased this as a used item and have played it a few times. There is a feeling of use, but there are no deformations or major dents, and there are no problems with playing. A mouthpiece maker with a workshop in Markneukirchen, Germany. This manufacturer has many variations and is characterized by being made by casting. The USA series seems to be designed with compatibility with American-style instruments in mind, and it seems to be intended to maintain a German-like tone while matching a powerful and wide blowing feel.