Description Product Description ■ to achieve a tone that tone B ♭ ■ Bell rich and spread, adopted a gold brass of one up. Diameter 123mm. ■ the inside diameter of the bore size tube has become a standard medium-large. ■ the introduction of the latest processing method by accessory mouthpiece computer, it comes with a mouthpiece TR14B4 of high precision. ■ silver plating specification instrument is characteristic is direct representation of itself, finer nuances silver plated finish put out. Soft and bright sound is attractive. ■ case included case is a TRC-850.