LifeSupplyUSA 4-Pack High Efficiency Odor Neutralizing Whirlpool Carbon Pre Filter; Compare to Part # 8171434K; Large 4 Carbon Pre Filters - Filters include Mounting Tabs! Fits Whirlpool air purifier models AP300, AP350, AP450 and AP510. Fits Whirlpool air purifier models AP300, AP350, AP450 and AP510 Also Fits Sears Kenmore Models 83200, 83202, 83230, 83354, 83355, 83351, 83375, 83376, 83378, 183063, 8171434, Progressive 335, Progressive 295. Direct replacement for Whilpool 8171434 and 8171434K Helps effectively filter airborne irritants such as smoke, pollen, dust, mold spores, pet dander and fabric fibers. by Vacuum Savings - Brand New Individually Sealed