Flanders-Precisionaire NaturalAire 21-5/8 in. L x 13-1/2 in. W x 1 in. D Air Filter 8 MERVFlanders Precisionaire NaturalAire 21 5 8 in. L x 13 1 2 in. W x 1 in. D Air Filter 8 MERV Brand Name: AAF Flanders Sub Brand: NaturalAire Height: 21 5 8 in. Width: 13 1 2 in. Depth: 1 in. Product Type: Air Filter Filters Smoke: No Metal Mesh Support: No Filters Viruses: No Filters Bacteria: No Filters Mold Spores: No Trimmable: No Filters Pollen: No Pleated: Yes Electrostatic: No Filter Class: Class II High Efficiency: No Merv Rating: 8 MERV Filters