Replacement 4-pack Carbon Pre-filters Compare to Whirlpool 8171434k 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 Helps remove household odors including: smoke, cooking and pet odors Carbon filter includes mounting tabs on top and sides (same as the original) Aftermarket 4 Pack By All-Filters, Inc Made in the USA From All-Filters, Inc