LifeSupplyUSA Filter fits Whirlpool 1183051K Plastic Frame for AP150 and AP250 Compatible with Whirlpool air purifier models AP150 and AP250 Measures approximately 16 x 11 x 2 Inches Compare To Part # 1183051K !!! PLASTIC FRAME !!! Helps effectively filter airborne irritants as small as .3 microns from air passing through the filter (smoke, pollen, dust, mold spores, pet dander, fabric fibers, etc.) Brand New Individually Sealed - By LifeSupplyUSA