Flexzion Trumpet Mouthpiece Replacement 7C Size Gold Plated Rich Tone Musician Instrument Accessory for Yamaha Bach as Gift to Beginner Advanced Players Mouthpiece size good for high register and also C trumpet Best choice for you, or giving your friends is a good idea Great for intermediate to advanced players 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