Brand new, unopened! Instant purchase, late-night purchase, silent transaction OK --- TH658-1S Water Purifier Cartridge, Set of 3, Compatible with TOTO (TH658S/TH658R/TH658/TH658-1R compatible) All-in-one chlorine removal cartridge, replacement for water purifier combined faucet/water purifier only faucet, built-in water purifier cartridge for wall-mounted single-lever mixing faucet [JIS Standard Tested]: Tested based on JIS standards by a specialized Japanese organization, confirming both safety and performance. You can use it with peace of mind. [Compatible Product/TOTO Compatible]: Replacement cartridge for TOTO spout-in type (water purifier integrated with faucet). Compatible with many model numbers such as TH-658-1S / TH658-3. Not a genuine product. [High Water Purification Performance]: Removes 7 substances (free residual chlorine, CAT, mold odor (2-MIB), soluble lead, phenols, geosmin, anionic surfactants). Hollow fiber membrane, ion exchange fiber, activated carbon, and non-woven fabric are used as filter materials. [Long-lasting Set of 3]: Replacement目安 is approximately 4 months/1 piece when using 10L per day. Can be used for approximately 1 year with a set of 3. *The replacement period varies depending on the usage environment (water volume, water quality, water pressure, etc.). [Precautions for Use]: After replacement, be sure to run purified water for 1 minute or more before use. Please check the product description for details on the applicable cartridge model numbers and faucet body model numbers.