This is a mouthpiece for French horn. It will be sterilized and cleaned before shipping. Manufacturer: YAMAHA Model Number: Yamagishi Hiroshi Model 2: Y-STAGE2 Retail Price: 17,050 yen Inner Rim Diameter: 17.56 Bore Size: 4.22 Shank: European ↓ Quoted from Yamaha's website: It has a slightly deep U-cup shape and a medium throat diameter, making it compatible with a wide range of instruments. The cup diameter is about 0.4mm smaller than the "Y-STAGE". The rim is thick, making it suitable for players who seek durability.