From Theo's Website:

The GAIA 3 alto is fully re-designed!   It still has the classic Meyer style of sound, but with many visible, and hard to see innovations.

SHARK-GILL BAFFLE™

The result of the GAIA 3’s new design is a freedom of play never before experienced in a traditional sounding alto mouthpiece!  Easy to see innovations include our proprietary Shark-Gill Baffle™, which improves the airflow and opens up the sound.  Harder to see is the redesigned baffle shape and chamber:)  Once you spend some time on it, you will find a dynamic range and flexibility not found in any other mouthpieces.

This piece is in wonderful condition and features a #6 facing. It comes with its original ligature, cap, pouch and box!