Waterdrop Water Filter for Sink Faucet, NSF Certified Water Purifier, 320 Gallon Tap Water Filter for Kitchen Sink, Reduces Chlorine, Lead-Free Material, Faucet Mount Water Filtration System 4 Filters - : . 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. Operating Temperature: 41-122/ 5-50; Operating Working Pressure: 15-100 psi / 100-689 kPa. - NSF certifications: 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. Please Note: This system DOES NOT lower TDS value. If you want to decrease the TDS value, please choose Waterdrop RO system. - Longer filter life: Each faucet filter provides 320 gallons of cleaner water, or 3 months of typical use - thats 2x longer than most faucet filters. 3-pack replacement filters are available for purchase! (Search WD-FF-01A) - Lead reduction: The innovative ACF material features great and fast filtration. You will fill up 4 water bottles (16.9 oz for each) in 1 minute. Upgraded filtration technology to reduce lead chlorine, offering safer and refreshing water for you and your family.(Tested by third party laboratory) - Convenient usage: The design of a simple switch between quality filtered water and regular tap water helps prolong the service life of the filter. The filtered water faucet adopts leak-proof technology and can be attached to your faucet very easily with the various adapters included.