HDX FMM-2 Replacement Water Filter / Purifier for Whirlpool Refrigerators (2 Pack) REMOVE IMPURITIES FROM WATER: NSF CERTIFIED to reduce chlorine, lead, iron, manganese, hydrogen sulfide, zinc, asbestos, and other volatile organic chemicals that could be present in your water supply NO TOOLS NECESSARY: install your filter DIY style by unscrewing the old one and screwing in the new one DUAL PACK LASTS UP TO A YEAR: keep your family or household safe for a whole year with each filter lasting up to six months USA MADE CARBON FILTRATION retains the dangerous hydrophobic particulates while allowing beneficial hydrophilic particulates to enter your water supply REPLACES FILTERS FOR WHIRLPOOL FRIDGES: MAYTAG UKF8001, UKF8001AXX, 67003523, 67003526, 67003527, 67003528, 12589203, 125892066, 12589208, 12589210, 13040216, 1304216N, UKD9001. WHIRLPOOL 4396395, UKF8001, UKF8001AXX-750, 67003523-750, UKF8001AXX-200, UKF9001AXX-100, FILTER 4