Universal Ozone Plate MADE IN USA By CP3 Inc. 4.5" x 4.5" for Fresh Air EcoQuest Alpine Vollara GreenTech Spring Air Natures Air (1)

They worked great until I washed them in warm water and amonia per instructions. ALL THE SCREENS FELL OFF! If you don't wash them with Amonia, they don't work as well, if you do wash them they break- order other ones from another vendor.I ordered these a few years ago and they worked well, and washed up fine too:https://www.amazon.com/gp/product/B00AT4ZUPW/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 by.... 1 X Ceramic Ozone Plate for EcoQuest Fresh Air and others 4.5"x4.5" by EcoQuestParts.com