Key: BBbSize: 5/4Bore: .748-inch Primary; .787-inch 4th ValveBell: 18.9-inchBell Material: Yellow BrassBell Position: UprightNumber of Valves: 4Valve Position: Front ActionValve Type: Piston ValvesValve Material: Stainless SteelFeatures: 4 Piston Valve Design; Vertical Pull Tuning SlideCase: NOMouthpiece: NOFinish: Lacquer (Silver Finish Available by Special Order)