Nutone SK5509000 Indicating Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>This is an O.E.M. authorized part</li><li>Fits various Nutone models</li><li>OEM Part Number SK5509000</li><li>This is a Nutone replacement part</li><li>Part Number SK5509000</li><li>This is an O.E.M. part</li></ul></div><img src="http://ecx.images-amazon.com/images/I/61azDMJhs%2BL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31Fok5vkHsL.jpg" noproxy>