-The Accessory Push your guitar harder? without feedback! The Suppressor? controls annoying feedback without tone loss. It allows the guitar top to breath for better sustain. Quick and easy to install and remove. Fits most standard acoustic guitar soundholes. Soft rubber insert won?t harm your guitar?s finish. Helps stabilize tuning, and maintains your guitar?s natural tone. Patented louvers help make The Suppressor? out-perform the competition.