Waterdrop 17UB 3 Years Under Sink Water Filter, Under Sink Water Filtration System, NSF/ANSI 42 Certified, Reduces PFAS, PFOA/PFOS, Lead, Under Sink Water Filter with Faucet, 24K gal. Extra RF17 Replacement Filter Cartridge For 17UA/17UB Under Sink Water Filter, Reduces PFAS, PFOA/PFOS, Lead, Chlorine, Bad Taste and Odor, NSF/ANSI 42 Certified, 24K gal. High Capacitypecial Feature PFAS, PFOA/PFOS and Chlorine Reduction, 36 months or 24000 Gal. NSF/ANSI 372 and 42, Easy Installation PFAS, PFOA/PFOS and Chlorine Reduction, 36 months or 24000 Gal. NSF/ANSI 372 Ampnd42, Easy Installation Product Dimensions 3.9 in. L x 3.6 in. W x 19.1 in. H Package Information Faucet Efficient Filtration: The Waterdrop Direct Connect Under Sink Water Filter System is tested by IAPMO against NSF/ANSI 42 for reduction of chlorine, taste and odor. Tested by KC authorative organization, it can effectively reduce VOC(chloroform), benzene, chlorobenzene, chloropicrin and styrene. It can effectively remove sediment, rust and other large particles. Tested by third party laboratory against NSF/ANSI 53 standard it can reduce lead. Besides, it can reduce PFAS, PFOA/PROSAISM Certified Safe. Material: Made from premium BPA-free and lead-free materials, the under sink water filtration system is certified by IAPMO against NSF/ANSI 372 Standard, ensuring reliable use from the inside out. To look over the 42 and 372 certification, please search in.WD-17UBin. on IAPMO official website.