Definitive Technology RCS II Rough In Bracket (Single， Silver)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Single in-ceiling speaker in bracket </span></li><li><span class="a-list-item"> Equipped with two 5.25-inch high-definition cast-basket bass/midrange and two 6.5-inch pressure-coupled low bass radiators </span></li><li><span class="a-list-item"> Frequency response: 22Hz - 30kHz </span></li><li><span class="a-list-item"> Equipped with one 1-inch pure aluminum dome tweeter </span></li><li><span class="a-list-item"> Outer flange size: 15.5 W x 15.5 H inches </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/21zntbkrApL.jpg" noproxy>