Key: BbBore: .590-inch; 4th Valve .669-inchBell: 11.8-inchBell Material: Heavy Gold BrassBell Position: UprightValves: Stainless Steel PistonNumber of Valves: 4Valve Position: Traditional (3 Top + 1 Side)System: CompensatingFeatures: Heavy Gold Brass BellCase: YesMouthpiece: YesMouthpiece Shank: LargeFinish: Lacquer, Silver