Denis Wick 4L gold-plated. It has a cup inner diameter of 30.5mm, making it an easy-to-play size. When attached to a B♭ or E♭ trumpet and used in a wind band or ensemble, it is thought to be a very good match. It has been carefully stored, so while there are minor scratches, it is in beautiful condition. There is no peeling or fading of the gold plating. Due to the rise in gold prices, gold-plated mouthpieces have become surprisingly expensive. I don't think you can get this at this price, so please consider purchasing it. Thank you for looking.