The Dunlop Suppressor Pro reduces the amount of feedback from your acoustic guitar without any loss of tone. Developed by innovative guitar builder Todd A. Falk, the louver design lets air flow through the soundholeallowing the top to vibrate naturallyso your true acoustic tone rings through. This essential stage tool is made of a light weight aluminum plate and soft rubber ring that will fit most standard acoustic guitars. Turn your volume up on stage without the fear of feedback with the Dunlop Suppressor Pro.Reduces feedback without loss of tone Light aluminum plate and soft rubber ring Fits most standard acoustic guitars