Description The Winix 115112 Replacement Filter G is a complete one-year filter set. The Winix Washable True HEPA Filter captures 99.97%* of airborne allergens including pollen, dust, smoke, pet dander, and other ultrafine particles as small as 0.3 microns. The 4-pack Carbon Filters trap large particles and absorb odors and extends the life of the Washable True HEPA Filter.The genuine Winix Filter G is compatible with Winix Air Purifier unit 5500.*Based on an independent laboratory test conducted on particles as small as 0.3 microns in size.