Thank you very much for viewing. Domus Signature Model. This is the signature model of Mr. Johann Doms, former principal trombone player of the Berlin Philharmonic Orchestra. Tilz is a leading mouthpiece manufacturer in Germany and Europe. They manufacture all kinds of brass mouthpieces, pursuing a balance of sound in all areas such as design and metal. Their extensive model variations number over 1500. ■ Bruno Tilz TROMBONE EUPHONIUM MOUTHPIECES Bruno Tilz Trombone and Euphonium Mouthpieces ■ Model Number: 830-3-3 ■ Cup Inner Diameter: 25.0mm ■ Bore Inner Diameter: 5.0 ■ Depth: F (Shallow) ■ Shank Size: Large shank For your reference, the current list price is 23,100 yen.