Duck Brand Air Vent Filters, Reduce Airborne Particles like Dust, Dander, Pollen and Trap Debris in your Ventilation System, Air Register Vent Filters for Home, 4 In. x 12 In., 12-Pack, White

REDUCES AIRBORNE PARTICLES: Air vent filters keep the air in your home cleaner; reduce airborne particles such as dust, dander and pollen. TRAPS DEBRIS: Vent filters keep animal hair, dirt and other objects out of duct work; polyester material catches airborne and fine particles. TRIM TO FIT: These air vent filters fit most standard sized vents; each filter is 4 in x 12 in; easily trim to size with scissors, if needed. EASY INSTALLATION: For use in floor or ceiling air vent registers throughout the home; remove existing register; if needed, cut vent filter to size; install in bottom of register or register opening; replace register into vent opening; Warning: Overuse may result in airflow restriction that could cause damage to the HVAC system. CONVENIENT REPLACEMENT: Each pack includes 12 air vent filters to use throughout the home; recommended replacement every three months