Yamaha 11B4 Trumpet Mouthpiece – Semi-Shallow Cup, Brilliant ToneYamaha Model 11B4. A somewhat shallow cup and medium rim for extra endurance. Brilliant tone. Similar to a Bach 7D. Inner Diameter = 16. 46mm. Contour = semi flat. Thickness = standard. Cut Depth = semi shallow. Throat = 3. 65mm. Backbone = semi narrow.
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Yamaha Model 11B4. A somewhat shallow cup and medium rim for extra endurance. Brilliant tone. Similar to a Bach 7D. Inner Diameter = 16.46mm. Contour = semi-flat. Thickness = standard. Cut Depth = semi-shallow. Throat = 3.65mm. Backbone = semi-narrow.
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Yamaha 11B4 Trumpet Mouthpiece – Semi-Shallow Cup, Brilliant Tone