Ortega Guitars ELIMINATOR86 Feedback Eliminator， 86 mm Diameter<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Designed to play at a far greater volume on stage without the risk of unwanted howling or feedback </span></li><li><span class="a-list-item"> 86 mm diameter， fits most nylon and classical guitars sound hole </span></li><li><span class="a-list-item"> Safe for the instrument due to the soft rubber </span></li><li><span class="a-list-item"> Quick and easy to install &amp; remove </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/4145gg75PUL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51OPQziktfL.jpg" noproxy>