【Price reduced, please consider!】 Denis Wick Euphonium Mouthpiece, ULTRA-X SM3X (Silver) supervised by Steven Mead. I used it in conjunction with SM3U, but I'm selling it because I don't use it as often. Compared to SM3U, the bore size is larger, but the cup is slightly shallower, so the 3X has better breath support. Or rather, the 3U takes away too much breath, haha. The rim is flatter than the 3U and the edge is sharper, so the sound starts clearly. Although the inner rim diameter is large at 26.40mm, the shallow cup allows for good high-range notes. It produces a brighter tone than the SM3U, so I used it for pop songs like the New Sounds series. The original purchase price was 25,410 yen. There are scratches from use, but there are no major scratches, dents, or shank distortions. It is in relatively good condition, but please understand that it is a used item. I will ship it in the original box. Instant purchase without comment is also welcome.