Naturalaire Pleated Filter 21-1/2 " X 21-1/2 " X 1 " Synthetic Pleated Media Merv 8UPC: 031949481469 Manufacturer Part No: 84858. 01215215 Air Filter Size: 22x22x1 Actual Size: 21 3 8 x 21 3 8 x 3 4 in. Electrostatic: No Brand Name: NaturalAire Filter Class: Class II Filters Bacteria: Yes Filters Dust Lint: Yes Filter Material: Synthetic Filters Pollen: Yes Filters Mold Spores: Yes Height: 21 1 2 in. MERV MPR Rating: 8 MERV Filters Viruses: Yes Metal Mesh Support: Yes Pleated: Yes Number in Package: 1 pk Product Type: Air Filter