Brand new, unused item! [Compatible Bottle-Type Water Purifiers] CP407, CP405, CP012, CP207, CP205, CP007(GR), CP007(RD), CP006, CP005, CP015, CP002, CP025, GP001JP, CSP4, CP508-GR, CO503-GR [Filter Material Selection] Activated Carbon: May adsorb pesticides, solvents, industrial waste, and chemicals, and helps to reduce unpleasant odors. Furthermore, it can remove harmful substances such as chlorine, chloramine, phenol, and tannin. Hollow Fiber Membrane: Removes turbidity components of 0.1μm or more, such as bacteria and aggregates. [Durability] Usage of 2L per day: Approximately one cartridge every 3 months. It can purify about 180 liters of tap water, and one cartridge can be used for months in a household. [Easy Installation] Compared to ordinary built-in faucet water purifier cartridges and built-in water purifier cartridges, bottle-type water purifier cartridges are easy to install, and you can drink clean water anytime without having to go to the kitchen when you want to drink water.