AF Compatible Replacement HEPA Air Purifier Filter & 4 Carbon Filters Fit Whirlpool AP250 & AP150 Part # 1183051K Designed to fit: Whirlpool AP250 & AP150, compare to 1183051K We back all of our products with a 100% satisfaction guarantee Breathe easy: Genuine HEPA filter removes even the smallest particles of allergens, impurities, and odors from the air and refreshes your home The AF brand: High-quality replacement products at a low price GUARANTEED SATISFACTION because of a 30 day full money bank guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!