Model Number: Willie's PM Silver Plated Signature model supervised by Mr. Otihiko Fujita Inner Diameter: 17.6mm Outer Diameter: 25.25mm Throat Diameter: 4.0mm Cup Shape: U Cup Shank: STD *STD (Suitable for 80% of horns, such as Wenzel Meinl, Hans Hoyer, Wilson, Paxman, Holton, etc. I used it on an American shank instrument, and it fit perfectly.) I purchased this one and a half months ago. I bought it for 33,000 yen. The rim is thin and comfortable, but I felt it was a bit large, so I will not be using it in the future and am putting it up for sale. The cup is shallow. There are clever designs in the space and resistance from the rim to the cup, and I think it's a good mouthpiece. There are some scratches on the shank as it has been attached to the instrument several times. I will ship it in the original box.