- The filter is used for refrigerators made by Samsung that are built door to door and that use an internal filter. - This filter is certified by the American Standards Institute NSF/ANSI ST53. - This filter is an original OEM model for a Samsung refrigerator. - According to the manufacturer's instructions, it is recommended to replace it every 6 months or when the water flow weakens. SAMSUNG: DA29-00020B, DA29- 00020A, DA2900020A, DA2900020B, DA-97-08006A, DA-97-08006A-B, DA-97-08006B, DA29-00019A, DA2900019A, DA97-08006A-B, Wss-2, WF294, AQUA FRESH WF-294, WATER SENTINEL: WSS-2, HAF-CIN, HAF-CIN-EXP, HAF-CINEXP, HAFCIN.