This item was sold as a single-unit π-water generator. It was explained that by placing 5 liters of tap water in a non-metallic container with this item for several hours, π-water would be produced. There are no instructions or box. The water becomes milder. Individual results may vary. Thank you for your understanding. *Price reduced from 12,000 yen to 4,000 yen. Size: Approximately 98mm x 73mm x 40mm - Material: Stainless Steel - Design: Perforated Top and Sides - Function: Water Filter Accessory - Warranty Number: 01817 #πwater #piwater Thank you for viewing this page from among many listings.