BIG BLUE 4.5 X 20" CATION RESIN WATER FILTER/CARTRIDGE

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BIG BLUE 4.5 X 20" CATION RESIN WATER FILTER CARTRIDGE

FOR HARDNESS REDUCTION (SOFTENER) SOFTENING FILTER (20" x 4.5") Fits Big Blue Housings 20" x 4.5" with Softener Resin 10% Crosslink