### Dual-layer Independent Filtration Structure(Front HEPA13 + Back Activated Carbon) Front pleated HEPA13 media traps 99.95% ultrafine plastic particles & PM2.5; rear honeycomb activated carbon eliminates VOC gas and printing odor separately. ### Surrounding Elastic Black Foam Sealing Edge High-density sponge wraps full perimeter to block air bypass leakage, force all polluted air pass through two filter layers fully. ### Built-in Orange Fabric Pull Strap For Easy Replacement Custom woven pull tab fixed on frame, grab ribbon to pull old filter out quickly without extra tools. ### High Fold Count Pleated HEPA Medium Deep folded filter paper expands effective filtering area, extends service cycle and avoids frequent early clogging. ### Tool-free Plug&Push Installation Design No screw needed, push filter into cavity tightly for stable fitting, fast daily maintenance.