Daddario PW-OPBKL O-Port Acoustic Sound Enhancer, Large, Black

Made to fit most common Soundholes, The D'Addario O-Port will provide a fuller sound with more volume, better clarity, and enhanced projection to any guitar from beginner to custom. The O-port will also suppress feedback on acoustic electric guitars and is made from a custom blended polymer for easy installation and to prevent any damage to your guitar's finish.