Protect your furnace from dust and allergens with the Duststop Furnace Fiberglass Air Filters, 16 x 25 x 1-in, 3-pk. Made with a moisture-resistant fiberglass blend and colour-coded frames for easy size identification, these filters provide essential furnace protection while still allowing airflow. The 1-inch thickness traps particles down to microns, blocking dust, pollen, and other allergens from circulating through your HVAC system. Included in this pack of three 16 x 25 x 1-inch filters, you'll have what you need to keep your furnace running efficiently for months. Extend the life of your expensive furnace equipment and breathe easier knowing these filters are on the job trapping dust before it becomes a problem.