16x20x1 (15.75 x 19.75) DuPont™ Allergen Air Filter (MERV 11) | AirFilters.com
16x20x1 Air Filters MERV 11 (6-Pack) by Tier1 | DiscountFilterStore
BNX TruFilter 16x20x1 Air Filter MERV 11 (6-Pack) - MADE IN USA - Allergen Defense Electrostatic Pleated Air Conditioner HVAC AC Furnace Filters for Allergies, Dust, Pet, Smoke, Allergy MPR 1200 FPR 7 - Amazon.com
Aerostar 16x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack - Walmart.com