Long Mesh Roll: at . 19.7' L x 9.8" W, this vent filter easily covers most vents; Its flexible design allows custom trimming for a precise fit, ensuring maximum attic airflow while keeping and debris out Reinforced Metal Backing: a rigid metal core prevents sagging and maintains shape under heavy rain, snow, or strong winds; Tested for extreme temperatures, it 't warp or crack over time UV and Water for : UV anti material resists sun damage, while the waterproof design prevents mold and deterioration; Performs reliably for years, even in harsh climates Activated Carbon Layer: the built in carbon filter blocks pollen, dust, and airborne particles while neutralizing odors, which can keep your attic cleaner and reducing musty smells without restricting ventilation Easy Roll Out Installation: simply unroll, cut to size, and secure with included nails; No special tools needed; The design makes DIY installation a quick, one person job, Weight: 1.1904962148 Pounds, Manufacturer: Gishbjka