Made in USA 20″ x 20″ x 4″, 35% Efficiency, Wire-Backed Pleated Air Filter ME…
Made in USA 20″ Noml Height x 20″ Noml Width x 4″ Noml Depth, 35% Capture Efficiency, Wire-Backed Pleated Air Filter MERV 8, Synthetic, Integrated Paperboard Frame, 500 Max FPM, 1,400 CFM, For Any Unit