Pleated Air Filter: Wire-Backed Pleated, MERV 8, Synthetic, 35% Efficient, 20" High, 20" Wide, 1" Deep | PRO-SOURCE Pleated Air Filter: Wire-Backed Pleated, MERV 8, Synthetic, 35% Efficient, 20" High, 20" Wide, 1" Deep - Paperboard Frame, 300 FPM, 825 CFM, Use with Any Unit