By A Mystery Man Writer
The most versatile high efficiency trumpet mouthpiece available today. We guarantee a perfect fit to your playing preferences. One Harrelson mouthpiece kit replaces your entire collection with our advanced modular system. Change from bright and focused to dark and spread in seconds.
SpectraTone Trumpet Mouthpiece by Jason Harrelson — Kickstarter
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The most versatile high efficiency trumpet mouthpiece available today. We guarantee a perfect fit to your playing preferences. One Harrelson
Harrelson 5MM Modular Trumpet Mouthpiece
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Harrelson Muse Modular MMXX Trumpet