Miraphone Tuba Mouthpiece TU25 (C9) Rose Orchestra Model Silver Plated Finish Used, purchased second-hand, and used a few times. There are no dents on the rim or shank. Before the war, brass instrument manufacturing was thriving in Czech-Graslitz. In 1946, 13 craftsmen who were active there established a workshop in Germany, which became MIRAPHONE. Among brass instruments, the tuba, in particular, has gained a lot of support from beginners to professionals worldwide due to its wide lineup and high quality achieved through handmade craftsmanship. Not only the instrument itself but also Miraphone mouthpieces, which have a bright and rich tone, are famous. Among them, TU21 and TU23 (old model numbers: C3, C4) are standard tuba mouthpieces and are used in school wind bands and brass bands. Cup Diameter: 32.7mm Bore Diameter: 8.2mm Cup Depth: Quite deep (45.7mm) For BB♭ and CC tubas MIRAPHONE MP TUBA TU25 (C9)