Filtrete 14-in W x 14-in L x 1-in MERV 14 2500 Smart Premium Allergen and Ultrafine Particle Electrostatic Pleated Air Filter in the Air Filters department at Lowes.com
Filtrete 14x14x1 Air Filter, MPR 700, MERV 8, Clean Living Dust, Pollen and Pet Dander Reduction 3-Month Pleated 1-Inch Air Filters, 4 Filters - Amazon.com
Filtrete 14x24x1 Air Filter, MPR 1500, MERV 12, Healthy Living Ultra-Allergen 3-Month Pleated 1-Inch Air Filters, 6 Filters - Yahoo Shopping