Build MY Mouthpiece

We are offering FREE 5MM Mouthpiece fitting sessions
when you visit our Denver, Colorado showroom
We no longer offer exchanges or returns on shipped 5MM kits and components

improve comfort - play longer - maximize range

We have worked closely with thousands of trumpet players over the past 20+ years to discover comfort and fit are more important than any other factor. We have listened to your concerns and developed a system that guarantees a perfect fit to you as an individual.

The "one size fits all" approach doesn't fly here. We build every solution around your personal needs.

Professional Race Car drivers are backed by 24/7 support teams to shave seconds from every lap.

Winning athletes train with the best coaches using cutting edge technologies and gear.

Now you can take your playing to the next level with Harrelson on your team.

Discover the world's most efficient mouthpiece solutions available in variations as diverse as your musical endeavors.

Test any 5MM variations in our shop to find the perfect setup
Call the 5MM Hotline at 303-657-2747

Ready to build your mouthpiece?

Your adventure begins with our 9-piece kit
Includes everything you need to set up two completely different sizes with 6 variations in tone color, attack and projection.

From this starting point, you can add components at any time to build endless variations suitable for every playing situation.