Filtrete 16x20x1 Air Filter, MPR 1200, MERV 11, Allergen Defense Odor Reduction 3-Month Pleated 1-Inch Air Filters, Pack of 2 - Amazon.com
Filtrete 11.5-in W x 11.5-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
3M Filtrete Air Filter Micro Allergen Reduction 24 " X 24 " X 1 " Merv 11 - Single: Replacement Furnace Filters: Amazon.com: Tools & Home Improvement