Tested and certified by NSF International against NSF/ANSI standard 42 for the reduction of chlorine, taste and odor, and to NSF/ANSI 372 for lead-free material. Provides you with safer and healthier water. 3 pack replacement filters are available for purchase! (Search "WD-FF-01A")High quality ACF filtration material. ACF is a strong barrier to impurities in water for long-lasting refreshment. Each faucet filter provides 320 gallons of cleaner water or 3 months of typical use - 2x longer than most faucet filters. 3-pack replacement filters are available for purchase! (Search "WD-FF-01A")0.5 GPM fast and stable water flow with highly-efficient filtration performance. Quick switch between filtered and unfiltered water for prolonged filter life.Works with standard faucets. Does not fit pull-out, hand-held, spray style faucets or faucets with sensor. Please verify if our product suits your faucet before purchase per the detailed instructions in product pictures.2,000 water bottles (16.9 oz for each) will be saved for less plastic waste. The operating temperature of this faucet system is 41-122°F / 5-50°C.