Rigid Cell Air Filter, Style - Air Filters Box, Performance Rating MERV 9, Nominal Filter Size 20x20x12, Filter Efficiency - Air Filters 45 Percent, Media Material Fiberglass, Frame or Header Material Galvanized Steel, Air Filter Header Type Single Header, Gasket Location None, Gasket Material None, Media Color Yellow, Media Area 33 sq ft, Media Separator Construction Metal Pleat