GR Compu-Bal 66.8 Trumpet Mouthpiece
GR Compu-Bal 66.8 Trumpet Mouthpiece - 66.8 C 2.4 is backordered and will ship as soon as it is back in stock.
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The GR 66.8 Series cup diameter is similar to a conventional 1 1/2 diameter.
These designs offer the 1 1/2C player a familiar feel but with a more efficient blow, full of overtones and better matched to both Bb and C trumpet.
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