Brand new, unused! SANEI LABO Replacement Cartridge for Purifying Shower (Recommended by the Japan Atopy Association) Purchased for a total of 1,746 yen, including tax (1,246 yen) and shipping (500 yen). Cartridge Replacement Guide: 1 person → Approximately 2 months (when used for 8 minutes per day per person) Free residual chlorine reduction capacity: Approximately 4,000L (Lifespan setting flow rate: 8L/min) Cartridge: Polypropylene Filter Media: Calcium sulfite, non-woven fabric Removed Substances: Residual chlorine Filtration Flow Rate: 8L/min Total Filtration Volume: 4,000 L Operating Water Pressure: 0.05MPa (dynamic pressure) ~ 0.75MPa (static pressure) Expiration Date: Approximately 2 months Maximum Operating Temperature: 60°C Japan Atopy Association: Aims to improve the lives of people with atopic dermatitis and allergic diseases, and to provide information for a correct understanding of these diseases.