Filter , Reduces Scale, Micron Rating Not Rated, Flow Rate 2 gpm, Inside Diameter 1 in, Outside Diameter 4 1/2 in, Overall Height 20 in, Service Life 4,500 gal, Filter Media Cation Resin, Ion Exchange, For Use With 20 in Housings, Application Water Softening, Media Resin, Filter Design Solid, Maximum Temperature 100 Degrees F, Series WS