Aprilaire 35 Humidifier Filters， Genuine Media for Aprilaire Models 350， 360， 560， 568， 600， 700， 760 &amp; 768 - 4 Pack<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"> 4 Pack! Save some money. </span></li><li><span class="a-list-item"> Genuine Aprilaire replacement parts made by Aprilaire in Wisconsin </span></li><li><span class="a-list-item"> Fits 600 Series， 700 Series， 560 Series， 350 and 360 units. </span></li><li><span class="a-list-item"> Easy Installation </span></li><li><span class="a-list-item"> Requires annual replacement. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/415aYt-HO1L.jpg" noproxy>