... . Double Zinc 3, High PH value 4. Enrich Oxygen Patented Household Water Filter, ,water tap filteration, water purification, Water softener, alkaline ... Oxygen5. Makes Energy Water6. Water could self cleanDescriptionWater filteration for household useLife time / Warranty3-5 YearsMaterials Foodclass ABSAccessoryUniversal adaptors, Sealing RingsOptional ...