General description These 2Pack Air Purifier Filters are designed for compatibility with various models, including HRF201B, HHT290, and several others. They feature dual-action HEPA-Type filtration with a built-in carbon pre-filter, effectively capturing up to 99.97% of particles as small as 0.3 micrometres, ensuring cleaner air in your home. Technical specifications Compatible Models: HRF201B, HHT290, HHT270, HHT270W, FRF101B, FHT170W, FHT180W, FHT190W, FRF102B, FHT170WCV, FHT180X, FHT180, FHT190V Filtration Efficiency: Captures up to 99.97% of particles down to 0.3 micrometre Material: Plastic Package Contents: 2 x Air Purifier Filters Measurement Allowed Error: +/- 1-3cm Installation Easy to replace; no tools required Simply remove and replace from your unit when needed Usage For best performance, replace the old filter every 2-3 months Replace the pre-filter every 1-2 months Replacement timing can be adjusted according to your requirements Other information Note: Light and