The Screeching Halt has a diameter of approximately 4 inches at its widest and tapers about .100".
SCREECHING HALT SOUND HOLE PLUG
The D'Addario 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' Soundhole and enjoy a feedback-free performance.
IDEAL FOR: LIVE PERFORMANCE