This is an "Isleriche" (currently EPM) trombone/euphonium mouthpiece, model 5GS, by Ailrich. I'm selling it because I haven't used it in a while. The retail price is 33,000 yen. I haven't dropped it, so the shank is not deformed, but there may be fine scratches from use. Please understand that I'm selling it at a low price. There is no box, but I will ship it in the soft case shown in the picture. It's 25.50mm with a 6.9mm bore (throat). It's a model with a smaller backbore and throat than the 5G, and a shallower cup. The rim is semi-flat and slightly thick. The cup is medium-deep. It's easier to play in the high register and has a brighter sound. The craftsmanship and finish are very beautiful. Type...Trombone/Euphonium Accessories/Parts...Mouthpiece