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Suitable for various air purifier models, covering daily purification, antibacterial and deodorization needs, and providing customized purification solutions for different scenarios. 1. Compatible models: 2/2S/2H/2C/PRO/3/3H/3C Purple filter element: with antibacterial coating, enhanced deodorization, suitable for children, elderly and other groups of people Grey filter element (recommended for high cost-effectiveness): For daily home use, it strongly intercepts large particle pollutants such as pet hair, dust, pollen, etc. The multi-layer fiber structure achieves efficient air filtration and circulation purification Black filter: Effectively adsorbs and decomposes gaseous pollutants such as formaldehyde and toluene, blocking bacteria and dust mites Purple and blue filter element: It combines antibacterial and odor removal functions with efficient filtration of PM2.5, PM10 and other particulate matter, suitable for haze and odor environments Grey+Black Filter Cartridge: Capable of intercepting large particles for daily use, versatile and suitable for complex pollution scenarios in homes Grey dual tube filter cartridge: An additional high-capacity activated carbon inner cylinder is added. Improve the filtration efficiency of particulate matter, increase the capacity of activated carbon, and achieve longer lasting purification efficiency. 2. Compatible models: 4/4 Pro/4 Lite Grey filter: For daily home use, it intercepts large particles such as pet hair and dust, and efficiently filters and purifies the air Grey dual tube filter element: With a brand new dual tube structure, it is suitable for households with higher requirements for air quality. 3. Compatible model: PRO H Blue filter: efficiently filters PM2.5, PM10 and other particulate matter, suitable for home environments with severe haze and particulate matter pollution 4. Compatible models: 4 Compact White filter element: precisely adapted to the model, efficiently purifies indoor air, and meets daily cleaning n