PERFECT FIT - The AP-T20FL Replacement Filter is designed for HoMedics 5-in-1 Tower Air Purifier models AP-T20 and AP-T20WT, with noted incompatibility for AP-T40/T30/T10 series units. 3-STAGE PURIFICATION - This three-stage filtration system integrates a pre-filter for capturing large particles, that filters out micron airborne contaminants, and an activated carbon layer with 2.5x enhanced density for neutra lizing household odors and VOCs. COST-EFFECTIVE BUNDLE - Each package contains 2 complete filter unit with built-in pre-filter and full-wrap carbon layer, manufactured to exact 6.3"×6.3"×7.8" dimensions for airtight sealing. The industrial-grade construction maintains stable airflow for 6-8 months under average 8-hour daily operation. EFFORTLESS SETUP - With tool-free installation completed in under two minutes, the rigid frame design prevents warping while remaining fully compatible with your purifier's maintenance alert system through precise dimensional matching. CUSTOMER SERVICE - Supported by direct Amazon communication channels with 12-hour response commitments, we offer free replacements for transit-damaged filters and troubleshooting guidance to ensure year-round air quality control. AP-T20 Replacement Filter Compatible with Homedics AP-T20, AP-T20WT, AP-T20BK and AP-T22 Air Purifiers, 3-in-1 Air Filter, Part# AP-T20FL, 2 Pack