Aprilaire 4331 Water Distribution Tray<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"> These are the water distribution trays which distribute water evenly to all portions of the evaporative panel </span></li><li><span class="a-list-item"> They attach to the u-shaped scale control insert and incorporate a pumice coating inside of them to distribute the water evenly to all portions of the Tray </span></li><li><span class="a-list-item"> This even water distribution ensures maximum evaporation from your humidifier </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41icqoXyhkL.jpg" noproxy>