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For with Whirlpool air purifier models AP300, AP350, AP450 and AP510
Filter captures 99.7-Percent of particles as small as 0.3 microns
Helps remove common household odors, including smoke cooking odors and pet odors
Helps filter dust, pollen and smoke
Imported from USA
Genuine Replacement Pre-Filters For Whirlpool Whispure Air Cleaners - Whirlpool Part #8171434. Ready-to-use right out of
the box, each pre-filter will last for about 3 months depending upon the environment and are sold in a 4-Pack for a
year's supply. One way to tell it is time to replace them is by the color. They are almost black to begin with and turn
a light gray color when they need to be changed. Fits Models AP350, AP450 and AP510.