ProTec Extended Life Replacement Humidifier Filter， 3 Count<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Removes Minerals and Pollutants from Water</li><li>Antimicrobials Treated Filter - Helps prevent the growth and migration of mold， algae and bacteria on filter</li><li>The Cool Mist Wicking Filter should be replaced about every two months， depending on use and local water hardness</li><li>This is a ProTec replacement part</li><li>Part Number PWF2M</li><li>This is an aftermarket of generic part</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41YtVE5UcPL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31HddanmQZL.jpg" noproxy>