SODIAL(R) Sliver Copper Alloy French Horn Mouthpiece For Conn / King French Horn This is a professional French horn mouthpiece, made of high quality copper, both durable and stylish. It is computer-aided design system and computer controlled lathe work together to produce the most precise mouthpieces. For Yamaha or Bach, Conn and King French Horn. Suitable for French horn professional enthusiasts and beginners.