Genuine Dynamic Polarized Replacement Media Pads for Dynamic Air Cleaner as well as Natures Home MicroPower Guard , One Hour Xenon Power Guard , SpacePak PurePak , EarthPure Air Cleaners , ClimateMaster , Pristine Air and other 24 Volt Electronic Air Cleaners. NOTE: Replacement filter media is NOT ordered based upon the dimensions of the media. Do not measure the Pad itself , replacement pads are ordered based on the panel size…the outside dimensions of the aluminum and plastic filter frame. To make sure you order the correct replacement filter media you will need to get the part number from the white sticker located inside the edge frame of the air cleaner. Images shown are for illustration only. [Addiitonal Sizes May Be Available…Contact Us for Details]