HIGH QUALITY: The trombone mouthpiece is made of high-quality copper material, the surface is silver-plated, the luster is long-lasting, the polished smooth, durable, and can be used for a long time. EASY TO PLAY: Easy to install, plug it in and start creating beautiful music. The smooth surface will not hurt your lips. The copper material is safer than other metals. It is the first choice for musical instrument accessories for students. COMPATIBILITY: Compatible with most tenor trombones. 12.7mm / 0.5inch, pocket size, small enough to slip into your pocket and enjoy the music wherever you go. GREAT GIFT: This exquisite trombone mouthpiece can be used as a gift for beginners, professional players, children, and adults. Can meet the needs of different occasions such as schools, concert halls, band practice, etc. OUR SERVICE: If you have any questions about this trombone mouthpiece replacemnt, please feel free to contact us by email, and we will serve you wholeheartedly before and after sales.