HDX 14 in. x 20 in. x 1 in. Superior Pleated Air Filter FPR 9, MERV 12 HDX1P9-011420 - The Home Depot
Filtrete™ High Performance Air Filter 1900 MPR UA05-4, 14 in x 20 in x 1 in - The Binding Source
Filtrete 14-in W x 20-in L x 1-in MERV 13 1900 MPR Premium Allergen, Bacteria and Virus Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
PRO-SOURCE - Pleated Air Filter: 14 x 20 x 1″, MERV 8, 35% Efficiency, Wire-Backed Pleated - 06222145 - MSC Industrial Supply
Filtrete 14 In. x 20 In. x 1 In. 300 MPR Basic Dust & Lint Furnace Filter, MERV 5 - Anderson Lumber
Filtrete Electrostatic Air Filter 700 MPR 705-4PK-1E, 14 in x 20 in x 1 in (35.5 cm x 50.8 cm x 2.5 cm) - Strobels Supply