1183054K HEPA Filter, Large Replacement for Whirlpool Filter True HEPA filter provides best filtration available, capturing up to 99.97 percent of particles down to 0.3 microns in size including smoke, dust, pollen, pet hair and dander, and dust mites Fits Whirlpool large console air purifiers AP510, AP450, APR451, AP51030K, AP51030KB, APR45130L, AP45030K High quality aftermarket replacement filter