Product review (3 stars): Wrong size.  Does not fit ReliOn Model WA-8D as defined in product description
Product description says it " Fits ReliOn humidifier model WA-8D " that has dimensions " 5" H x 3 1/2" ID x 5 1/2" OD x 1" Thick ".  My ReliOn WA-8D original filter is 4-3/4" H x 4-3/4" ID x 6-3/4" OD x 1" thick.  The new filter is too small so I cut it to make it larger but leaves an air-gap of approximately 4" around the circumference.  Vendor has incorrect information in the product description.  Otherwise, performs like any other paper filter.