KELLY Trumpet Mouthpiece ●About Kelly MouthpiecesKelly Mouthpieces are designed, manufactured, tested, packaged, and warehoused at our factory in Fond du Lac, Wisconsin, USA. Founders Jim and Shelley have been working tirelessly for over 30 years, constantly evolving and incorporating the latest equipment, sharing a life filled with music. ●Kelly mouthpieces are made from the highly sought-after LEXAN (polycarbonate resin), and are available in a wide range of colors, with the smooth feel and rich tone that are characteristic of polycarbonate resin. This mouthpiece can adapt to a variety of environments and music! *LEXAN is a material known as polycarbonate resin, which has water-like transparency, unparalleled impact resistance, and high heat resistance up to 125°C. Surprisingly, it is an extremely excellent material that is stronger per weight than steel. For those who often play outdoors... It does not get cold like a metal mouthpiece, even when playing outdoors in the cold, so it is also recommended for outdoor marching and school festival events. For those who want to practice to improve their skills... Transparent colors such as crystal clear can be used to check things like embouchure. It is made of polycarbonate resin, so it is very durable and will not easily deform even if dropped. It is also recommended for those with metal allergies! Kelly Mouthpiece (for Trumpet) Model / 7C (equivalent to Bach 7C size) Diameter (mm) / 16.51mm Throat / S Cup depth / MEDIUM SHALLOW *No accessories such as package cases are included. The mouthpiece is sold separately. When shipping, we will put it in a zipper bag and pack it securely.