UPGRADE YOUR WATER. UPGRADE YOUR HEALTH! Details : Material in Device:Himalaya stonesKorean stonesJapanese stonesSilverJamun woodCopperMagnesiumZinc 6000 liters of Alkaline water production. MAINTENANCE COST $0. No maintainance needed, not like other devices. 0 maintaince cost. Replacement in half price after using 10000 liters of Alkaline water.