LUKAS-GD Horn Mouthpiece Inner Diameter: 17.5mm I received this from an acquaintance and am selling it to organize my mouthpieces, as I was using it as a sub. (*^^*) I usually use a U-cup, but this has a V-cup feel, so I didn't use it much. The cup is unified, and it's a rim-changeable mouthpiece! I'm not sure if rims from other manufacturers will fit (ˆ꜆ . ̫ . ). I looked up the cup details online, but couldn't find much information. I apologize. m(_ _)m Retail Price: Cup: 10,000 yen + tax Rim: 8,000 yen + tax The mouthpiece is silver-plated, so there is some discoloration, but it seems it can still be used. There are shank scratches from being attached to an instrument. Please understand that this is a used item that has been in the hands of others. (＞人＜;) I used it on an American shank instrument, and there was no looseness, so I believe it is an American shank. Immediate purchase: OK Price reduction: Not available