This 2-in-1 filter is designed for the Leitz TruSens Z-1000 Air Purifier, offering 360-degree filtration. The carbon prefilter captures odors and certain gases, while the HEPA Type filter removes pollutants as small as 0.3 microns. This combination effectively collects microscopic particles, allergens, and volatile organic compounds (VOCs), along with odorous gases. The filter is crucial for maintaining optimal air purifier performance. The design draws air from all directions, capturing pollutants that can affect allergies and symptoms. The carbon prefilter acts as the first line of defense against dust and pet hair. The HEPA Type filter traps fine particles, approximately 30 times smaller than a strand of hair. Your purifier will display a change indicator light when the filter needs replacement. Dimensions: 170 x 170 x 80 mm (h x w x d).