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Air Purifier Filters - Multi-Model Compatibility & Precision Purification Compatible with multiple air purifier models, covering daily purification, antibacterial deodorization, gaseous pollutant treatment and other needs, providing customized purification solutions for different scenarios. 1. Compatible Models: 2/2S/2H/2C/PRO/3/3H/3C Purple Filter: Equipped with antibacterial coating to inhibit bacteria and viruses, enhance deodorization. Suitable for children, the elderly and other groups. Gray Filter (Cost-Effective Choice): Designed for everyday home use, powerfully traps pet hair, dust, pollen and other large particulate pollutants. Multi-layer fiber structure enables efficient air filtration and cyclic purification. Black Filter: Strongly adsorbs and decomposes gaseous pollutants such as formaldehyde and toluene, while featuring antibacterial and antiviral properties to block bacteria and dust mites. Purple + Blue Filter: Combines antibacterial deodorization with high-efficiency filtration of PM2.5, PM10 and other particles. Suitable for environments with haze and odors. Gray + Black Filter: Integrates large particle interception for daily use and gaseous pollutant treatment, offering all-round adaptation to complex home pollution scenarios. Gray Dual-Cartridge Filter: Equipped with an additional high-capacity activated carbon inner cartridge, improving particle filtration efficiency and increasing carbon capacity for longer-lasting purification performance. 2. Compatible Models: 4/4 Pro/4 Lite Gray Filter: Designed for everyday home use, traps pet hair, dust and other large particles, enabling efficient air purification. Gray Dual-Cartridge Filter: New dual-cartridge structure, ideal for families with higher air quality requirements. 3. Compatible Model: PRO H Blue Filter: Efficiently filters PM2.5, PM10 and other particles. Suitable for areas with severe haze and environments dominated by particulate pollution. 4. Compatible Model: 4 Compact White Filter: Pr