?16 Stage Shower Filter?16-stage filter adopts KDF-55, Calcium Sulfite, Vitamin C Balls, Acid-washed active carbon, Negative Ion Balls, Defluoride Particles and other filtering materials, ensure maximum reduction of Chlorine, heavy metals (lead, mercury, nickel, chromium) and other harmful substance in your shower water.Soften water quality, providing you with the cleanest and most comfortable water flow.