WOODIFY℗ Sound Ring for Bass Flute

Sound enhancer on a vertical bass flute

I would give 5 stars to the product, because it works, but only after modifying it with (adding) rubber washers. Problem was that at full tightness it was too wide for my Jupiter di Medici Vertical bass flute. After the modificacion it does increase the volumen, which is why I bought it. I can provide photos if requested.