BRESLMAIR Horn Mouthpiece 1F5S Inner Diameter: 17.6mm Throat: 4.5mm Cup: Deep Rim Thickness: 3.73mm Rim Shape: Rounded and thin Around August 2023 Purchased for approximately ¥20,000 and used 2-3 times. It's generally clean, but there is some sign of use! Please refrain from purchasing if you are concerned about used items!