Perfect Compatibility: Specially designed for HoMedics TotalClean AF-20, AF-20FL, AP-25, AR-20 air purifiers(HEPA Filter Dimensions: 13.6" x 11.73" x 1.14"). Not compatible with other models - please verify your device before purchasing HEPA Filtration: Adsorbs 99.97% of dust, smoke, pet dander, and fabric fibers as small as 0.3 microns, ensuring cleaner indoor air Reinforced Pleat Design: Enhanced structure maintains optimal airflow while preventing clogging for long-lasting performance Complete Value Pack: Includes 2 HEPA filters + 4 activated carbon pre-filters for comprehensive air purification. The economical bundle provides long-term use at an affordable price Maintenance Tips: For best results, replace every 6 months (varies by usage). Gently vacuum or brush monthly to maintain efficiency AF-20FL Replacement Filter Compatible with HoMedics Air Purifier AF-20 AP-25 AR-20 Filter, fits Number AF-20FL AP-25CRF AF-25, include 2 HEPA Filter + 4 Carbon Pre-filters