L
Great compact "booster" that fits all trumpet mouthpieces!
Excellent when you want a booster on a trumpet mouthpiece but there is none that fits on the end. This adds the mass on the stem giving you some more power by minimizing the loss of power from vibrations in the mouthpiece-stem and It is easy to store and easy to remove when you dont want It there. The added weight is imprinted on the piece.
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