1、C refers to the holder of the mouthpiece, 7C is the smallest, and 3C is the largest. This set of 3 specifications of mouthpieces is the best gift for lovers or beginners, which can solve the difficulty of choosing a mouthpiece 2、Made of brass material, sturdy and durable, provides a bright tone for the trumpet 3、For beginners, usually starting with the smallest mouthpiece holder 7C, which is easier to play 4、For chamber music ensemble or solo concerts, players will choose 3C, because in this case, there is no need for loud volume, and will not exhaust you during solo concerts 5、The mouthpiece holder is gilded, smooth and perfect in every detail, very beautiful 6、Trumpet mouthpiece is suitable for students, intermediate and professional players 1 x Trumpet Mouthpiece Item Type: Trumpet MouthpieceMaterial: BrassColor: Golden