Keep your Aquifer® shower filtration system flowing with this replacement filter cartridge. The Aquifer® shower filter works with your handshower to effectively reduce chlorine and odor in your shower water, helping to maintain the natural moisturizing oils of your hair and body. Kohler® Replacement Filter Cartridge, Series: 30647, Aquifer®, For Use with: Model K-30646 Shower Filtration System, 4 gpm at 20 psi, 1-1/2 in W x 5-1/8 in H