TR-3 Tube Ring 26-29mm fits 6SN7, 6SL7 and 6V6 types

Golden Dragon tube rings by Duende Criatura considerably reduce distortion and self-oscillation from audio tubes. They have to be slid around the top part of the tube and where they reduce mechanical vibrations in the tube. The listener will notice improvement of three dimensional picture, a more controlled bass and cleaner soundstage. Medium Tube Ring to fit: 6SN7, 6SL7, 6V6 etc Diameter: 26-29mm