【Compatibility】For Shark HE401 filter replacement HE401 HE402 true HEPA filter replacement compatible with Shark air purifier 4 Fan Models (HE401 HE400 HE402 HE405 UA415). Compare to Part # HE4FKPET HE4FKPRO HE4FKBAS 100356-chn-1 Filters.【3-in-1 True HEPA Filtration System】This HE401 air purifier filter replacement is manufactured with H13 true HEPA, high-efficiency activated carbon and fine pre-filter to improve air quality.【Value Pack】Package includes 2 pack HE401 HE402 filter replacement for Shark air purifier 4. Reduce your electricity bills with our new HE401 air filter replacement.【High Efficiency】This HE401 filter for Shark Air Purifier 4 Filter Replacement provides the high efficiency on standards of 99.97% filtration, down to 0.3 microns, protects against household odors from cooking, cleaning products, smoking,and more.【Warm Maintenance Tips】For optimum performance of your air purifier,it is recommended to replace the HE405 filter every 6-12 months depending on the air quality in your area and the usage of the air purifier.【Please Note】This is not a Shark OEM product and is not covered under any Shark manufacturer's warranty. The Shark brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility.