Oxynator Deluxe Shower Filter with SkinCare Showerhead, Chrome Shower Filter Replacement Cartridge SLC-APSLC lasts 4-6 months or 7,000 gallons; 1 filter included. Flow Rate: Unique Flow Control, up to 2.5 GPM, Conserves Water and Energy (30% to 70%). Dimensions: 6" in length (with filter), 3" in width (at filter housing). Powerful invigorating spray with 10 times more oxygen. Removes 98.9% chlorine, NSF tested for chlorine removal, standard #177