MoreFilter.com is one of the top online shops for ultrawf water filter. We have more than 30 types of 4396841 water filter, most of them have been tested and certified by IAPMO to NSF/ANSI 42 (System) for lead free compliance, and are certified for Materials Safety, Structural Integrity and System Performance. We have 6 production lines, and our daily capacity is 15000 pcs.