This fridge filter is tested and certified by NSF International against NSF42. | This refrigerator water filter is certified by NSF International against NSF 372 for LEAD FREE. | Features simple design for easy, tool-free replacement. Provides up to 6 months or 300 gallons of refreshing water | If you're not satisfied with your purchase we'll give you a full refund, no questions asked. | Fit: Maytag UKF8001, UKF8001AXX, UKF8001-750, UKF8001P, UKF8001AXXP, 67002269, 67002671, 67003523, 67003526, 67003527, 67003528, 67003591, 67003727, 67006474, 67006637, 12589201, 12589203, 12589206, 12589208, 12589210; OWF51, WF50-NI500, WF50-WI500, 67003523, WF50-KWI500, WF50-NI300, WF50-KNI300, OWF50-WI500, OWF50-NI300, GI6FDRXXY07; 4396395, 8171032, 8171249, KBFS25ETSS01. This filter is not the original product.