Bach Cornet Mouthpiece 10 1/2 D GP GP... 24-karat to pure gold plated finish. This item has been plated at an atelier after being purchased new. There are many scratches and scuffs. I believe there are no problems with playing. Personally, I think I used it quite carefully. However, since it is a used item, I would like to sell it to someone who understands. I am very sorry, but... Please refrain from price negotiations. Thank you very much.