20 x 20 x 1 Fiberglass Air Filter, 4 Filters Z742934

Keep your equipment operating at its full potential with these Flanders Precisionaire Nested Glass 20' X 20' X 1' Air Filters. They're made of the same standard-grade materials as those protecting furnaces and central air conditioners around the world for over 50 years. These Flanders air filters have a filtering medium made of a continuous filament spun glass that allows for maximum airflow and features a self-retaining media that adheres directly to the frame for added resistance to wear. For peak equipment protection and energy efficiency . change them monthly.