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 16x20x1 Air Filter, MPR 1200 MERV 11, Allergen Plus Odor Reduction, 4 Filters - Walmart.com