C.G. Conn French Horn MouthpieceThe French horn mouthpieces from C. G. Conn are inspired and based from the great mouthpiece designs of the past. There are three sizes available to suit any level player from beginner to professional. C. G. Conn mouthpieces provide optimal comfort, response, and ease of play. The C12 has a medium cup depth The C10 has a medium deep cup depth The C8 has a medium deep plus cup depth