6-Pack Replacement LG LFX31945ST Refrigerator Air Filter - Compatible LG LT120F, ADQ73214404 Fridge Air Filter Replacement LG LFX31945ST Refrigerator Air Filter, Quantity: 6 Replacement LG LFX31945ST Refrigerator Air Filter Activated carbon air filter reduces odors and freshens the air inside your refrigerator. Helps prevent odor cros-contamination of food. For best performance, replace the filter every 6 months. On Sale for a Limited Time!