one piece brass bell lacquered, 127 mm diameter, soldered wire rim, reversed white brass lead pipe, Monel valves, valve diameter 16,9 mm, ML-bore 11,70 mm. All mechanics like finger buttons and water keys are silver-plated. Has a different design than the standard version of finger buttons and valve caps. Includes a complete Set of Heavy Caps, light case and 7C mouthpiece - TOP-Model easy response - professional - beautiful design!