True Blue Cold Air Return Filter Pad， 10x30<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Cut-to-fit your size; attaches to the back of your cold air return vent </span></li><li><span class="a-list-item"> Filters dust， dirt， pollen and pet dander </span></li><li><span class="a-list-item"> Lasts up to 30 days </span></li><li><span class="a-list-item"> Electrostatically charged filter media captures sub-micron airborne allergens </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/511zaGgp4XL.jpg" noproxy>