Nispira Refrigerator Air Filter Replacement for Whirlpool W10311524 AIR1, 4 Filters Premium replacement air filter for Whirlpool refrigerator. Replaces part W10311524 AIR1 Contains activated carbon media to deodorize any smell in the refrigerator Suggested to replace every 6 months to keep odor free in the refrigerator 4 filters included. Easy to install. Dimension: 3.2 x 1.8 x 1 inches 100% customer satisfaction guaranteed