Compatible Filter for LG LMX21981ST Refrigerator, Quantity: 4 Compatible Replacement for LT600P, 5231JA2006A, 5231JA2006B Fridge Water Filter Cartridge NSF 42 certified refrigerator water filter by IAPMO and WQA Reduces impurities & substances without restricting the flow rate of the water. For the highest quality water replace the filter every 6 months. This is a Denali Pure Brand replacement part, NOT an OEM product. All mentions of brand names or model descriptions are made strictly to illustrate compatibility. All brand names and logos are registered trademarks of their respective owners. This product is not affiliated with any OEM brands and is not covered under any warranties offered by the original manufacturers. Any warranties for this product are offered solely by Denali Pure.