Maintenance Material -12C Alto Trombone Mouthpiece Highlights Generic Brand 12C Alto Trombone Mouthpiece Description: The model of alto trombone mouthpieces It is a computer-aided design and computer-controlled lathe system work together to produce the mouthpieces The most accurate trombone mouthpiece are suitable for students, intermediates and professional amateurs and beginners It meets worldwide standards and also trusted by customers, teachers and musicians The best choice for you or giving your friends is a good idea Size Chart: Product Size: 8*3.8*3.8cm/3.15*1.5*1.5"" Connector Outer Diameter: 1.1cm/0.43"" Connector Inner Diameter: 0.9cm/0.35"" The Package Includes: 1 x 12C Alto Trombone Mouthpiece