Aprilaire 4010 Humidifier Transformer<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"> The Aprilaire 4010 Humidifier Transformer is designed for use with Aprilaire humidifiers 400， 550， 550A， 558， 560， 560A， 568 amp; 600 </span></li><li><span class="a-list-item"> Aprilaire 24v humidifier transformer. Input 120 vac， output 24v， 10 watt (10 va). Mounts in a utility box </span></li><li><span class="a-list-item"> Humidifier Transformer For Models 400， 550， 550A， 558， 560， 560A， 568， 600 </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41OKe9IfUxL.jpg" noproxy>