Dennis Wick Cornet Mouthpiece GP 5. I'm selling it because I've sold my cornet. I'd like to pass it on to someone, thank you. It's a V-cup with an inner diameter of 16.00, a rim of 5.30, and a bore of 4.5 (according to the music store description). I didn't use the cornet itself very much, and I was using a Yamaha, so I hardly used this mouthpiece. Therefore, it's in beautiful condition, but it doesn't have a box, so thank you. The current product price has increased to around ¥25,000, so I think it's a good deal.