Odor Removal Air Filter Pad Style - Air Filters Pad Nominal Filter Size 25x25x1 CCL4 Activity 60 Percent Filters Out MERV 1-4 Pollen Dust Mites Cockroach Debris Sanding Dust Spray Paint Dust Textile Fibers Carpet Fibers Performance Rating MERV 4 Media Material Carbon Media Color Black Recommended Final Resistance 1.0 in wc Max Temp 180 Degrees F Nominal Height 25 in Nominal Width 25 in Nominal Thickness 1/4 in Actual Filter Size 25 in x 25 in x 1/4 in