Brand new, unused item. Instant purchase OK. eSpring Water Purifier II (Built-in Type) and eSpring Water Purifier II (Countertop Type) Replacement Cartridge. This is a single cartridge that uses "compressed activated carbon filter + UV lamp" technology to inactivate 140 impurities with a 99.99% probability. *Please note that this is for eSpring II, not eSpring. If you replace the water purifier and filter once a year for 5000L and use it for 10 years, it costs only 8.5 yen per liter! *If you were to use mineral water, it would be 500ml (100 yen) X 10,000 bottles ≫ 1,000,000 yen! It's more economical and eco-friendly than buying plastic bottles. Plus, it's easy to drink. This water purifier is safer and more economical. Please refrain from comments regarding price reduction. The outer box has been opened, but the shrink film on the cartridge inside is unopened. It is a brand new, unused item. As shown in the photos, there is some damage and dirt on the box. Please understand this before purchasing.