Tri-KEY PRO® < more info >

2025 New Invention "CarolBrass Tri-KEY PRO®"

Tri-KEY PRO® is a new type of brass instrument featuring three (3) different natural keys.

When you unpack a brand new Tri-KEY PRO®, you will find it is in Bb key, in the Bb Mode.


When Tri-KEY PRO® is in Bb Mode, it is attached with a "Bb adapter".
The Bb adapter is with a tiny ring for which you can pull out the Bb adapter. 
You can see the "Bb adapter" between the bell tail and 1st tuning slide.


You will also discover a "G adapter" and a "F adapter" in the package of Tri-KEY PRO®


By switching the "adapter" and chaning the position of 1st, 2nd and 3rd tuning slides, you can turn the Bb Mode into G Mode or F Mode quickly.

The picture of G Mode:


F Mode


We made an instruction video, you can follow the steps and change the "Mode".
Make sure to choose the "4K" option and press "LIKE" button.