Specifications & Features: ~Dimensions: 24cm x 3.5cm x 30cm ~Filter layer: 4 ~Assembly required: No ~Number of packages: 1 ~4~layer filtration ~H11~grade HEPA filter ~Active carbon filter ~The filtration system has four layers to effectively free the air inside your home from contaminants. ~The air first passes through the pre~filter that traps larger particles. ~The H11~grade HEPA filter removes 99.97% of household dust, allergens and other harmful particles as small as 0.3 microns from the air. ~The cold catalyst filter removes formaldehyde and bacteria. ~And finally, the active carbon filter gets rid of lingering odours so that you end up with clean air that is completely healthy to breathe. Package Inclusions: ~1 x Air Purifier Filter Replacement Notes: ~The colors depicted on your computer monitor may differ from the actual colors due to variations in monitor display. ~Product sizing may vary slightly due to the nature of the manufacturing process and manual measurement.