Adams Prologue Bb Trumpet - SilverThis horn provides a compact, rich and flexible sound. It is easy to play, the attacks and its quality of sound make this model a great choice for a first step up trumpet. Made with the same quality as the professional model, this horn is a great value. SPECIFICATIONS PROLOGUE TRUMPET Key: Bb Bell Material: Yellow Brass Bell Diameter: 124 mm Bore: ML 11. 7 mm Finger buttons: Yellow Brass, flat Waterkey: Traditional Finish: Silver plated or lacquered