■ Wind Instruments: Tenor Bass Trombone, Tenor Trombone, Euphonium ■ Large Shank, Thick Bore ■ Made in JAPAN ■ Lineup ・6-1/2AL…【Cup Inner Diameter: 25.4mm】The most standard mouthpiece, perfect for beginners. You can play evenly from high to low notes. Completed in collaboration with Global Staff, XO Trombone players, and Mr. Nakagomi of "Willie's Custom Brass," a mouthpiece maker. Of course, made in Japan. Developed based on old Bach mouthpieces (Mount Vernon to Early Elkhart era), the ideal mouthpiece for modern players, unaffected by lip size, has been completed. This mouthpiece is recommended for all players, from beginners to advanced players. Willie's brand mouthpieces are expensive, but this one is available at an affordable price. We highly recommend it to those who play in the same brass band or orchestra!!