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
16x20x1 MERV 13 Allergy Elite Pleated Air Filter - Case of 6 - Atomic Filters
Filtrete 16x20x1 Air Filter, MPR 700, MERV 8, Clean Living Dust, Pollen and Pet Dander Reduction 3-Month Pleated 1-Inch Air Filters, 4 Filters - Amazon.com
Filtrete 16x20x1 Allergen Bacteria And Virus Air Filter 1500 Mpr : Target
Honeywell 16x20x1 Furnace Air Filter MERV 11 - 12 Pack