Micromall(TM) New Metal Trumpet Mouthpiece for Yamaha Bach Conn King Trumpet, 3C Sliver Material: Metal,Mouthpiece size good for high register and also C trumpet Best choice for you, or giving your friends is a good idea,For Yamaha or Bach, Conn and King Trumpet It is computer-aided design system and computer controlled lathe work together to produce the most precise mouthpieces Length: 8.7cm/3.43",Connector Outer Diameter: 1cm/0.39" Package Includes: 1 x Trumpet mouthpiece