Tested and proven to remove contaminants to deliver fresh, clean water. Offers a precise, leak-proof fit with easy installation. Uses a leak-proof filter and coconut shell carbon to trap. contaminants. Reduces chlorine and improves water’s smell and taste: Tested and Certified by NSF International against NSF/ANSI Standard 42. Lead-free: Tested and certified by NSF/ANSI 372. Reduces lead, cyst, benzene, carbofuran, and endrin: Tested and certified by NSF/ANSI 53. Reduces phenytoin, ibuprofen, naproxen, estrone, bisphenol A and nonyl phenol: Tested and certified by NSF/ANSI 401. For best performance, change filter every 6 months or 300 gallons, whichever comes first. Replacement model: LG LT600P, 5231JA2005A, 5231JA2005A-S, 5231JA2006, 5231JA2006A, 5231JA2006A-S, 5231JA2006B, 5231JA2006B-S, 5231JA2006E, 5231JA2006F, 5231JA2006F-S, 5231JA2006H, 5231JJ2001C,Kenmore 46-9990.