IcePure Replacement Water Filter for LT500P, 5231JA2002, 5231JA2002A, 5231JA2002A-S, 5231JA2002B, 5231JA2002B-S All the filter materials are certified by NSF to NSF/ANSI 51 and 61 Tested and Certified by WQA to NSF/ANSI 42 for Material Safety and Structure Integrity Tested and Certified to NSF/ANSI 372 Lead Free Compliance Manufactured in an ISO9001 facility It has 90 Day Money Back guarantee, No question asked