Filtrete 20-in W x 25-in L x 4-in MERV 12 1550 MPR Slim Allergen, Bacteria and Virus Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
3M 2003DC-6 20" X 25" X 1" Filtrete™ Ultra Allergen Furnace Filter - Replacement Furnace Filters - Amazon.com
Filtrete 16 In. x 25 In. x 1 In. Basic MPR Flat Panel Furnace Filter, MERV 2 (2-Pack) - Bliffert Lumber and Hardware
Filtrete 16 In. x 25 In. x 1 In. 300 MPR Basic Dust & Lint Furnace Filter, MERV 5 - Thomas Do-it Center
Filtrete 20 In. x 20 In. x 1 In. 1500 MPR Allergen, Bacteria & Virus Smart Furnace Filter, MERV 12 - Bender Lumber Co.
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
3M Filtrete 20x20x1 MPR 1200 Odor Reduction Furnace & AC Air Filter 4-Pack