Overseas parallel import product JIS Standard Inspected] TH658-1S Water Purifier Cartridge 3-Pack TOTO Compatible (TH658-3/TH-658-1S Compatible) Replacement for Faucet with Purifier/Dedicated Purifier Faucet Compatible/TOTO Compatible]: Replacement cartridge for TOTO spout-in type (integrated purifier faucet). Compatible with many model numbers such as TH-658-1S / TH658-3. Not an authentic product. [JIS Standard Inspected]: Inspected based on JIS standards by a specialized institution in Japan, confirming safety and performance. You can use it with confidence. [High Water Purification Performance]: Removes 7 substances (free residual chlorine, CAT, mold odor (2-MIB), soluble lead, phenols, geosmin, anionic surfactants). Uses hollow fiber membrane, ion exchange fiber, activated carbon, and non-woven fabric for filter media. [Long-lasting 3-pack]: Replacement目安 is approximately 4 months/unit with 10L usage per day. The 3-pack can be used for approximately 1 year. *Replacement time may vary depending on usage environment (water volume, water quality, water pressure, etc.). [Precautions for Use]: After replacement, be sure to run purified water for at least 1 minute before use. Please check the product description for details on compatible cartridge model numbers and faucet body model numbers.