Crucial Air HEPA Air Purifier Filter & 4 Odor Neutralizing Carbon Pre Filters. Designed to fit Whispure Air Purifier Models: AP350, AP450 & AP510. Compare to Part # 8171434K, 1183054, 1183054K, 1183054K Large, 1183054K Grand Format. Designed & Engineered by Crucial Air.This is a generic product designed and engineered in the United States by Crucial Air. This is not a Whirlpool® OEM product and is not covered under any Whirlpool® manufacturer"s warranty. The Whirlpool® brand names and logos are the registered trademarks of their respective owners. Purchase of this product voids your Whirlpool® warranty. Any use of the Whirlpool® brand name or model designation for this product is made solely for purposes of demonstrating compatibility.