Fits the Envion AllergyPro air cleaner model AP350 (Will NOT fit the Whirlpool AP350). HEPA filter captures unwanted indoor air particles such as pet dander, pollen, mold, dust, smoke and more. Filter life is approximately 6 months, depending on use of your unit. Approx. Dimensions: 15 7/16 x 12 3/4 x 1 1/2 Brand New, Individually Sealed - By LifeSupplyUSA