Planet Waves O-Port Sound Enhancement for Acoustic Guitar， Large， Black<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Richer， fuller， louder sound with more clarity and better projection </span></li><li><span class="a-list-item"> Simple installation by loosening or removing strings and fitting the O-Port into soundhole </span></li><li><span class="a-list-item"> Suppresses feedback </span></li><li><span class="a-list-item"> Fits soundholes from 38.75" - 4" (98.43 cm - 10.16 cm) </span></li><li><span class="a-list-item"> Requires no modification to the instrument </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41n7SkSR90L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31n6KG16zdL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/91sinRESciS.png" noproxy><img src="http://ecx.images-amazon.com/images/I/01xbQLdh40S.png" noproxy>