Filtrete 20x30x1 Air Filter, MPR 300, MERV 5, Clean Living Basic Dust 3-Month Pleated 1-Inch Air Filters, 6 Filters - Amazon.com
3M Filtrete 1500 Ultra Allergen Reduction Air Filter - 20x30x1
Filtrete 20x30x1 Air Filter, MPR 1900, MERV 13, Healthy Living Ultimate Allergen 3-Month Pleated 1-Inch Air Filters, 6 Filters - Amazon.com
Filtrete 20x30x1 Air Filter, MPR 1500, MERV 12, Healthy Living Ultra-Allergen 3-Month Pleated 1-Inch Air Filters, 4 Filters - Replacement Furnace Filters - Amazon.com
3M Filtrete 2200 Elite Allergen & Home Pollutants - 20x30x1
Filtrete Electrostatic Air Filter 700 MPR 722-4PK-1E, 20 in x 30 in x 1 in (50.8 cm x 76.2 cm x 2.5 cm) - Strobels Supply
Filtrete 20-in W x 30-in L x 1-in Basic Flat Panel Basic Flat Air Filter (2-Pack) in the Air Filters department at Lowes.com
Filtrete 20-in W x 30-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