The filter is double certified against NSF/ANSI 42 and 372 without guidance from NSF& IAPMO. Compatible Models: DA29-00020B, DA29-00020B-1, DA29-00020A, DA-97-08006A, HAF-CIN, HAF-CIN-EXP, HAF-CINEXP, HAFCIN, DA- 97-08006A, DA-97-08006A-B DA-97-08006B and more. 100% natural coconut shell carbon block absorbs more contaminants than mixed carbon blocks. Low price, offers you a unique filtering experience. Filter Life: Filter life is 6 months or 300 gallons, which varies depending on water conditions.