YAMAHA Yamaha Short Cornet Mouthpiece CR-11E4(S) Inner Rim Diameter: 16.46mm Throat Diameter: 4.20mm Purchased in November 2024. My elementary school daughter used it for about a month in the brass band club. Since she switched instruments from cornet to trumpet, I am selling it while it's still in good condition. Original Price: 6,380 yen (tax included)