33x37x4 MERV 10 Heavy Duty/High Volume PleatGHXS33A37A4A $108.40 SKU: GHXS33A37A4A Back $108.40 Quantity -+ Add to Cart Details 33x37x4 MERV 10 Heavy Duty/High Volume Pleat DetailsBackDetails33x37x4 MERV 10 Heavy Duty/High Volume PleatSee MoreSee Less