Pleated Air Filter: Wire-Backed Pleated, MERV 8, Synthetic, 35% Efficient, 20" High, 25" Wide, 1" Deep | PRO-SOURCE Pleated Air Filter: Wire-Backed Pleated, MERV 8, Synthetic, 35% Efficient, 20" High, 25" Wide, 1" Deep - Paperboard Frame, 300 FPM, 1050 CFM, Use with Any Unit