Key Bb. Bore .590 inch; 4th Valve .669 inch. Bell 11.8 inch. Bell Material Heavy Gold Brass. Bell Position Upright. Valves Stainless Steel Piston. Number of Valves 4. Valve Position Traditional 3 Top 1 Side. System Compensating. Features Heavy Gold Brass Bell. Case Yes. Mouthpiece Yes. Mouthpiece Shank Large. Finish Lacquer, Silver.