SchmidtDigital 13.5 Gold Plated Finish Thank you for viewing. This is a European shank model with a shallow cup. Inner diameter 18.5mm, throat diameter 4.1mm Although it is listed as a U-cup in the Dolce catalog, it gives the impression of being almost a V-cup. The rim is very smooth and flatter, but it gives a controllable impression. The weight is quite light, but it has a sense of rigidity, and I was impressed by the careful cutting process. As the impression suggests, this is a mouthpiece that prioritizes high tones, and the large cup may be suitable for fine movements. The pitch and resonance points are quite unique, and it seems that it did not match the instruments I have. (I only had a Yamaha 87d that could be matched to the European shank, but I couldn't understand the pitch points well) It might give a different impression when combined with a descant or 103. It might be suitable for chamber music with continuous high tones, such as Brandenburg. I tried playing the trumpet with an adapter shank, and it sounded like a trumpet. No claims and no returns, but I would love to hear your impressions of the feel of using it, as I would like to share them as experience.