Filtrete 16-in W x 20-in L x 1-in MERV 14 2500 Smart Premium Allergen and Ultrafine Particle Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
Filtrete by 3M 16x20x1 MERV 10 Micro Particle Reduction HVAC Furnace Air Filter | eBay