1. Our trumpet mouthpieces are made of brass, offering a comfortable touch and beautiful tone. The thick silver-plated surface is easy to wipe and keep clean. 2. The set includes 3 trumpet mouthpieces (1 7C, 1 5C, and 1 3C). This kit may meet the needs of different occasions and learners. 3. Our 3 sizes of trumpet mouthpieces, from the smallest to the largest, are not easy to distinguish with the naked eye, including the outer ring, inner cup, inner diameter, and inner tube. However, the engraved model helps to distinguish different types in a short time. 4. If you are a beginner, you can start with the 7C mouthpiece, which may make it easier to produce sound when playing. After practice, when your lip muscles get stronger, you can consider switching to the 5C mouthpiece and then to the 3C mouthpiece. The 3C mouthpiece is suitable for some trumpet players with more experience. 5. Our instrument accessories are compatible with most standard trumpets. They may meet the needs of different occasions, such as schools, concert halls, bars, homes, band practice areas, as well as the learning needs of players. 6. Color: Silver 7. Material: Brass 8. Package contents: - 1 7C mouthpiece - 1 5C mouthpiece - 1 3C mouthpiece Only the above package contents are included, and no other products are provided. 9. Notes: Light reflection and different monitors may cause slight differences between the color of the item in the picture and the actual product. A measurement error of ±1 - 3 cm is allowed.