EarthSmart W2 refrigerator replacement water filter is certified against NSF/ANSI 42, 53, 372, 401, P473 & CSA B483.1 to reduce Lead, Cyst, 70+ VOC's (Volatile Organic Chemicals), Mercury, Asbestos, Pharmaceuticals, BPA, PFOA & PFOS as well as Chlorine taste and odor to ensure high quality and performance. Fits the following Whirlpool Filters: Filter 5, 4396510 KitchenAid: 4396163 Thermoform: 491879 Kenmore: 46-9010, 46-9902, 46-9908 Maytag: 8212652 Puriclean: IV, 8212652