Filtrete™ High Performance Air Filter 1900 MPR UA00-4, 16 in x 20 in x 1 in - The Binding Source
Filtrete 16-in W x 25-in L x 4-in 11 MERV 1000 MPR Allergen Defense Electrostatic Pleated Air Filter (2-Pack) in the Air Filters department at Lowes.com
Filtrete 16x25x1 Air Filter, MPR 1500, MERV 12, Healthy Living Ultra-Allergen 3-Month Pleated 1-Inch Air Filters, 2 Filters - Amazon.com
Filtrete 24" x 24" x 1" Allergen, Bacteria and Virus Smart Air Filter White S-2012-4 - Best Buy
3M 243826 Filtrete Smart Air Filter - 14 x 20 x 1 in., 1 - Kroger