Nordic Pure 20x20x2 (19 1/2 x 19 1/2 x 1 3/4) Pleated MERV 12 Air Filters 3 Pack - Replacement Furnace Filters - Amazon.com
HDX 24 in. x 30 in. x 1 in. Standard Pleated Furnace Air Filter FPR 5, MERV 8 (3-Pack) HDX3P5-012430 - The Home Depot
Filtrete 19.5-in W x 29.5-in L x 1-in MERV 11 1085 MPR Allergen Defense Extra Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
Nordic Pure 20x24x2 (19 3/8 x 23 3/8 x 1 3/4) Pleated MERV 12 Air Filters 3 Pack - Replacement Furnace Filters - Amazon.com