Longer Effective Working Life：Newest Silver-Coated Fiber Primary Filter Material Eliminates The Surface Electrostatic Effect So That Intercepted Dust Cannot Completely Block The Airflow. This Extends The Service Life of The Filter Higher Effective Filtration Efficiency：For Grain Diameter Greater Than 0.3 Micron Particles, The Combined Maximum Filtration Efficiency Hits 99.92%（It Has Been Tested by a Professional Third Party Air Laboratory According To “ISO/TS 11155-1”） Silver ion Technology：The Silver-Plated Fiber Material Contains Non-Attenuating Silver ions on The Surface, Making The Airflow Cleaner And Healthier Stronger Gas Adsorption Capacity：Using Porous Impregnated Activated Carbon, The Comprehensive Adsorption Rate of Organic Gas Was ≥98.74%. It Can Effectively Adsorb Acidic Gases in The Air; Ammonia; Sulfur Dioxide And So On Products Are Suitable For：Toyota Tundra，RAV4， Highlander， Sienna，Sequoia，Camry，4Runner，Corolla，Yaris，Avalon，Venza，Prius，Matrix，Land Cruiser；Lexus LS，GX，IS，NX，RX，ES，LX，CT，LFA；Subaru Outback，Legacy Service Life Recommendations And Declarations：This Product Has a Very Long Service Life, Supporting At Least 18,000 Miles or 18-24 Months of Normal Use in Urban Environments Ultra-Long Life Four-Layer Hepa Composite Activated Carbon Cabin Air Filter, Using Silver Coated Fiber As A Primary Filter Material