Filtrete 20-in W x 24-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 20x24x1 Air Filter, MPR 1000, MERV 11 4 pack - general for sale - by owner - craigslist