This is a high-performance water purifier set using a RO membrane (reverse osmosis membrane) system. It consists of a 1-stage pre-filter + RO 75G, effectively removing impurities and TDS. As it's a pump-free type, it's quiet, energy-saving, and simple to install. It can be widely used for household purposes, aquariums, coffee, experimental applications, and more. --- 【Main Specifications】 ・RO Membrane: 75G ・Pump: None ・Operating Water Pressure: 2-3 bar ・Operating Water Temperature: Up to 25°C ・Input TDS Target: Up to 250 ・Size: Approximately 36 x 10 x 16 cm ・Condition: New, Unused This product can be ordered directly. ※ Simple plumbing work is required for installation. ※ Please check the specifications before purchasing for specialized applications. Activated Carbon Filter: +2000 yen Carbon Block Filter: +2200 yen PP Filter: +1700 yen DI filters are also available for use in aquariums, such as for saltwater fish.