The Eastman ETR834S Professional Series C Trumpet is tuned to the key of C and ideal for experienced players. The Pro Series trumpet features a .459" medium large bore and a one-piece yellow brass bell. Along with monel pistons, a two-piece valve casing with nickel-silver balusters and a Shires USA 3C mouthpiece, the silver-plated trumpet also includes a deluxe case with storage pockets and backpack straps for comfortable transport.