Features Conn "Symphony" - Double rotor dependent system, .562" primary bore, .594" bore through rotor sections 9-1/2" rose brass bell, open wrap valve systems with traditional rotors three interchangeable leadpipes Clear lacquer finish Conn 1-1/2G mouthpiece, 7562C case Description Product Description Key of B. .562" primary bore, .580" bore through rotor sections, stacked rotors function as a dependent system, 9-1/2" annealed rose brass bell, 3 interchangeable mouthpipes, chromeplated inner slides, lacquer finish. Comes with 1-1/2G mouthpiece and deluxe wood shell case.