OxyBlast Shower Filter with 6-Spray Showerhead Shower Filter Replacement Cartridge SLC-APSLC lasts 4-6 months or 7,000 gallons; 1 filter included. Flow Rate: 2.5 GPM, Conserves Water and Energy. Dimensions: 6" in length (with filter), 4" diameter shower head. 6 oxygen-rich sprays; 8 intake ports; Rapid-touch selector; 62 nozzles with twin burst power sprays. Removes 98.9% chlorine, NSF tested for chlorine removal, standard #177