The mission of Patrick Mouthpieces is to provide trumpet players the tools necessary to perform on their instruments what they hear in their head, and to enable us all to switch between musical genres and not compromise sound or performance.
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This back-bore is on all of our commercial back-bores. It has a 27 hole, and has a very straight taper. While not "tight" it is the most focused and smallest of our tapers and matched up great to the smaller pieces so that you don't "fall in" to the mouthpiece.