Purchased a 3 pack of dirt devil dust shield A/C filters made by american air filter company out of Louisville Ky. Put the first one in and as soon as the A/C unit came on, it folded into a "V". Put a second filter in, same thing happened. On the filter is stamped 20x25x1.in small numbers on the filter is stamped 13/16". The filter measures about 11/16, less then 3/4's of an inch thick. Talk about a rip. A waste of time and money.
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