Key: BbBore: .610-.638-inch Graduated BoreBell: 11.4-inchBell Material: Yellow BrassBell Position: UprightValves: Stainless Steel PistonsNumber of Valves: 4Valve Position: Traditional 3 Top + 1 SideSystem: CompensatingFeatures: Compensating Valve System; Graduated Bore; Gold Brass LeadpipeCase: YesMouthpiece: YesMouthpiece Shank: LargeFinish: Lacquer, Silver