Refrigerator FreshFlow™ Air FilterThis FreshFlow Air Filter keeps pollutants out of your refrigerator while allowing air to actively pass through the filter. Made from carbon based material that reduces common food odors, it's 15 times better than baking soda at eliminating odors. This air filter measures 3"W x 2"H and is white in color. It should be replaced every 6 months to ensure optimum performance in your refrigerator. This is an accessory that can be used with several brands;