Model Number: Willie's SJ S Silver Plated Milky Cup / Silver Finish (S Rim / S Blank) Inner Diameter: 17.45mm Throat Diameter: 4.2mm Cup Shape: U Cup Shank: STD *STD (Compatible with 80% of horns, including Wenzel Meinl, Hans Hoyer, Wilson, Paxman, Holton, etc.) Purchased a week ago for 33,000 yen and used for two days, but I've decided to sell it because it doesn't suit me. Please understand that there may be scratches on the shank from attaching it to an instrument.