Kaz Protec PDC51V1 Demineralization Cartridge for Vicks Humidifiers V5100 and V5100N<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"> This Demineralization Cartridge is a replacement for the older part number: DC-51-6 </span></li><li><span class="a-list-item"> he Demineralization Cartridge is placed in the bottom of the humidifier and helps to filter the water and remove large particles and minerals so that they are not misted into the air with the wate </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51%2BQvqehsrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51L0wXnJBrL.jpg" noproxy>