Filtrete 20x24x1 HVAC Furnace Air Filter, MPR 1500 MERV 12, Allergen,
This is for 2 filters. Therecare a couple bent corners
Glasfloss GDS 20x24x1 Disposable Fiberglass Panel Air Filters. 12 Pack
Made in USA. The GDS disposable panel filter is available in many standard sizes.