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
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
Filtrete by 3M, 16x25x1, Elite Allergen Reduction HVAC Furnace Air Filter, 2200 MPR, 1 Filter - Walmart.com
3m Filtrete Air Filter 20 " X 30 " X 1 " Fiberglass Merv 11 - Replacement Furnace Filters - Amazon.com
Filtrete Ultimate Allergen 16x25x1, Air Filter : Target
3M Filtrete 16 in. W x 20 in. H x 1 in. D Pleated Air Filter (Pack of 4) | eBay