●??[Precise Design] Our trumpet mouthpiece set includes size of 3c, 5c and 7c from small to large. Each part adopts precise design, which is hard to identify with the naked eye. ●??[Durable&good-looking] The trumpet mouthpiece set is made of sturdy and durable brass. The exquisite surface with engraved lettering helps to clearly distinguish the different types in a short period of time. ●??[Suitable for Different Players] The trumpet mouthpiece set includes 3 piece of trumpet mouthpiece (1x 7C, 1x 5C, 1x3C). 7C. The set can meet the requirements of difference occasions and stages of learning of the performer. ●??[Good compatibility] The mouthpiece is compatible with most of the trumpets such as Yamaha, Bach, Conn,King and so on. ●??[Worry-Free Warranty] Cheerock provides a 100% money-back 60-day guarantee and 24hrs customer service. If you are not satisfied or have any questions, please feel free to contact us to get a satisfied solution.