Thank you very much for viewing. This is a mouthpiece with an interesting concept, "for sousaphone," released by Perantucci, the world's most popular mouthpiece brand. It combines a large inner rim diameter with a rim that provides a quick response, allowing for performance even with slight position adjustments. Furthermore, the use of a heavy-type blank ensures the sound projection required outdoors, allowing the sound of the sousaphone to be delivered clearly even in a wide field. Initially considered a mouthpiece for sousaphone, its high basic performance led to a surge of artists playing it with regular tubas, and it has now secured a position as a quick-response megatone-type mouthpiece. No. 3 Rim Inner Diameter: 33.0mm (actual measurement) Throat Diameter: 8.5mm (actual measurement) This model has the most direct sound in the SOUSAPOWER lineup. The airflow is excellent, and the sound reaches every corner of the venue. Although it may seem that the large throat requires a lot of air, the sharp rim allows for a good response even with less effort. Although unused, the box has some damage. For your reference, the current list price is 22,000 yen (including tax). Thank you for viewing.