Duraflo 6013BL Roof Dryer Vent Flap with ATT Collar， Black<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Excellent UV performance</li><li>Leak-proof， seamless outer shell</li><li>Unique chatter less flapper</li><li>Attractive low profile styling</li><li>Flexible flange will not crack on installation， even in extreme cold</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31lCtYWLIYL.jpg" noproxy>