Product review (5 stars): Perfect fit and draws-up the water as well as a paper filter
Perfect fit for my ReliOn Model WA-8D humidifier.  This filter, and my original ReliOn WA-8D filter is 4-3/4" H x 4-3/4" ID x 6-3/4" OD x 1" thick.  Some folks had issues with this synthetic filter not wicking up the water as well as a paper filter...  I found that it works just as well in pulling up the water.  I was consuming 1 gal per day with the old paper filter and now the same with this new filter.  My humidity runs about 15% indoors (extremely arid climate) so that may be the difference.