CORNET MOUTHPIECE 7D4D SHORT SHANK

"Yamaha Model 7D4D. Small inner rim diameter. Flat and wide for extended endurance. Bright, round tone. Outstanding high tones. Similar to a Denis Wick S. Inner Diameter = 16.24mm. Contour = semi-flat. Thickness = thick. Cut Depth = semi-deep. Throat = 4.1mm. Backbone = semi-wide."