Feature: Bullet shape trumpet mouthpiece It is computer-aided design system and computer controlled lathe work together to produce the most precise mouthpieces Made of high quality copper alloy Suitable for trumpet professional enthusiasts and beginners. Name: Trumpet Mouthpiece Size: 3C/5C/7C for option Surface Material: Silver Plated Body Material: Copper alloy Color: Silver, (Gold color optional) Length: 90mm End Outer Diameter: 27mm Connector Outer Diameter: 11mm