The YHR314II is Yamaha's new student model. It features a robust yet lightweight design, smooth rotary valve action and is free blowing, making it easy for a student to pick up and play. Standard Series F Single Horn Key: F Valves: 3 rotary valves Bell size: M Bell type: Fixed Bore: 12mm (0.472") Valve casings: Yellow brass Valve rotors: Solid Lever action: String Finish: Clear lacquer Lightweight case.