Electro-Air Part # M1-1056 Size 16" x 25" x 5" (Actual size: 15 3/8" x 25 1/2" x 5 1/4") Nominal size 16" x 25" x 5" Merv 11 Filters out 97% of airborne particles. Removes dust, pollen, molds, tobacco smoke, pet dander, airborne dust mites.