GP Series has been created especially for professionals who require superior quality from their mouthpiece. The GP Series features an innovative shape and extra-heavy gold-plate finish for players who prefer a focused, concentrated tonal core.
| HR30-GPR | 17.08 | 4.40 | Smaller inner rim diameter than the 31. All-around type. Shallow “U” cup facilitates high notes, while a deep “V” makes low notes easy. |
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| HR31-GPR | 17.28 | 4.40 | Medium rim configuration provides flexibility for difficult passages. Relatively large throat delivers a heavy, somewhat dark tone with extra volume. |
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| HR32-GPR | 17.48 | 4.40 | Larger inner rim diameter than the 31. Authoritative low notes. Large cup volume for a rich, mellow tone. |
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