Take your electric acoustic playing to new levels…in volume, that is. The Planet Waves Screeching Halt soundhole plug allows you to play your electric acoustic at far greater volume, without unwanted feedback or howling. The tapered design allows for a great fit in most soundholes, while the inert material is safe for your guitar’s finish. Simply place the Screeching Halt into your acoustics' sound hole and enjoy a feedback-free performance. Eliminate feedback and enhance stage volume Quick and easy to install & remove Soft rubber insert safe for guitar finish Tapered design allows greater fit to a variety of guitars Fits 4" Soundhole Requires no modification to the instrument Planet Waves, part of the D'Addario family of brands, is known for innovative, problem-solving, quality musical accessories. Planet Waves offers a complete line of award-winning accessories including cables, picks, tuners, capos, straps, humidifiers, maintenance tools and more.