The air clear out shall we air actively pass through the filter, aiding neutralize odor and bacteria Filters should be replaced every single 6 months 15 times more powerful than baking soda Carbon founded materials reduces typical food odors Colour:As shown Material:plastic Package Contents: 12 x Refrigerator Filter Only the above package content, various item aren't included. Note: Light capturing and varied exhibits could cause the color of the thing within the photograph a little different from the real thing. The size allowed error is +/- 1-3cm.