20x20x4 MERV 11 Puracell II, Plastic Frame Single Header, Synthetic MediaPUPFSH202041O $227.72 SKU: PUPFSH202041O Back $227.72 Quantity -+ Add to Cart Details 20x20x4 MERV 11 Puracell II, Plastic Frame Single Header, Synthetic Media DetailsBackDetails20x20x4 MERV 11 Puracell II, Plastic Frame Single Header, Synthetic MediaSee MoreSee Less