gap solutions made simple

Increase Flexibility

Adjust Slotting

Increase or Decrease Air Flow

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Harrelson solutions simplify the process of Solving Mouthpiece Gap issues

How to achieve optimum Mouthpiece Gap in 3 easy steps - Part 1

Achieving Optimum Mouthpiece Gap in 3 Steps - Part II

Harrelson Shim Kit to reduce gap: A Survey of Thirty-one Mouthpieces

Mouthpiece Gap Measurement Tool (GMT)

$48.00

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Mouthpiece Venturi Measurement Tool (VMT)

$52.00

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Complete Mouthpiece Gap Solution Kit

$125.00

The more affordable way to adjust gap, impedance, flexibility, and slotting!

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