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  • >
  • Complete Mouthpiece Gap Solution Kit

Complete Mouthpiece Gap Solution Kit

SKU: GapSolutionKit
$125.00
$125.00
Unavailable
per item

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

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I am really pleased with the GAP shims, they make my trumpet more free blowing.
                                                                                                                                                       
-Brian Kirk


This Set Includes:
  •     Venturi Measurement Tool (which is also the shim installation/removal tool)
  •     Gap Measurement Tool
  •     A Set of 10 Gap Shims in 5 different lengths .020/.040/.060/.080/.100 in .345" inside diameter
  •     installation and removal instructions complete with graphics and video
  •     links to Harrelson Trumpets research, development and science behind closing mouthpiece gap​

The Venturi Measurement Tool (VMT) allowing you to easily identify your Venturi inside diameter in .003" increments from .337" to .352". The VMT also holds a full set of gap shims (sold separately) that unscrew from the base and the small end doubles as a shim kit installation and removal tool. The Gap Measurement Tool will allow you to determine the current gap of any standard trumpet and mouthpiece. Understanding Mouthpiece Gap options often holds the potential to make your least favorite horn one of the best you've ever played. ​

​Purpose: Reducing the Gap between the mouthpiece and leadpipe could dramatically improve the playability of your current trumpet setup.  

​*Fits most trumpets. Email or call us if you have a rare instrument for custom sizing.

How to achieve optimum Gap:
    1) Measure your current gap with the included Gap Measurement Tool
    2) Determine your target gap - usually .060 to .100 inches
    3) Medium & Wide Gap: Insert appropriate gap shim inside the receiver with the Venturi Measurement Tool (sold separately)
    4) Narrow Gap: Some players may also find they would like to reduce length of mouthpiece shank

Harrelson Shim Kit to reduce gap: A Survey of Thirty-one Mouthpieces
Video Demonstration of the Harrelson Gap Solution Set

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Send an email by clicking the envelope icon to the right. Or call ahead and visit us for an in-person lesson or tour. 303.657.2747

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  • Performance
    • SpectraTone
    • Build My Mouthpiece >
      • Intro to Mouthpieces
      • Artist Series >
        • Artist Bodies
        • Artist Rims
    • Mouthpiece Components >
      • Rim Sizes
      • Cup Sizes
      • Throat Sizes
      • Body Sizes
      • Backbore Sizes
      • Nut Sizes
    • Increase Efficiency >
      • Mod Kits
      • Finger Button Options
    • Adjustable Performance
    • Adjustable Peformance Tools
  • Advantage
    • Trumpet Momentum >
      • Trumpet Momentum Level 1 >
        • TM 1 - Blog
        • TM 1 - Assessments
        • TM 1 - Exercises
      • Trumpet Momentum Level 2 >
        • TM 2 - Blog
        • TM 2 - Assessments
        • TM 2 - Exercises
        • TM 2 - Beta Testing
      • Trumpet Momentum Level 3 >
        • TM 3 - Blog
        • TM 3 - Assessments
        • TM 3 - Exercises
        • TM 3 - Beta Testing
        • TM 3 - Case Studies
        • TM 3 - Regional Clinics
    • The Harrelson Story
    • We have Your size
    • Technology
    • 100% Guarantee
  • Instruments
    • Model Comparison
    • Buy A Harrelson
    • Muse Modular MMXX
    • 2021 VPS Summit G-Series
    • "X" Series
    • Limited Editions >
      • Summit One
      • Summit Midnight
      • Summit Art
    • Bravura Series >
      • 2021 Bravura Flugelhorn
      • 2021 Bravura Piccolo
    • 2018 VPS Summit Series
    • HT6 - Kickstarter 2022
    • VPS Summit Eb
    • Acoustic Armour
    • Trumpet Gallery
  • News
    • Jason's Blog >
      • Jason Harrelson
    • Lessons Link
    • Teacher Information
    • Weekly Trumpet Challenge
    • Get Social
    • Clinics & Tours
    • Our Clients >
      • Client Features
    • Jen's Blog
    • Company History
  • Clients
    • Contests & Winners
    • Order My Trumpet >
      • Leadpipes & Bells
      • Tuning Slides & Bell Crooks
      • Receivers
      • Bottom Cap options
      • Water Keys
    • Contact Us
    • Shipping
    • Instrument Registry
    • Acclimation
    • Maintenance
    • Roots of Music
  • Store