GLACIER FRESH GF-MWF Water Filter Statement: The materials and construction comply with the NSF42 standard. Go to NSF’s database, the manufacturer "Ningbo Pureza Technology, LLC" and model number "GF-MWF". If you find that the product is not NSF42 certified, you can apply for a ten-fold claim for the purchase amount. Premium replacement for MWF: Retains beneficial minerals while removing impurities, serving you a superior grade of filtered water. Tested & verified by independent laboratory testing, the GF-MWF refrigerator water filter removes 97.9%* chlorine and improves water’s smell and taste. Compatible Water Filter Replacement: SamrtWater Filter, MWF Water Filter, MWFP Water Filter, MWFA Water Filter, MWFAP Water Filter, MWFINT Water Filter, GWF Water Filter, GWF01 Water Filter, GWF06 Water FIlter, GWFA Water Filter, HWF Water Filter, HWFA Water Filter, FMG-1 Water FIlter, FMG Water FIlter. Kenmore* 46-9991 Water Filter, Kenmore* 46 9991 Water Filter, Kenmore* 469991 Water Filter, Kenmore* 9991 Water Filter etc. Twist and Lock Design: Offers a precise, leak-proof fit, tool-free, no-mess refrigerator water filter replacement. Approved and tested by WQA, the USA Water Qualification Association, Using only high-grade coconut carbon blocks to absorb bad containment. 6 Months Filter Life: For best filtration results, water filter cartridge should be replaced every six months or 300 gallons. Safer drinking, GLACIER FRESH that protects whole family.