3M 2500 SERIES 20X25X1

A 4-pack of 20x25x1 electrostatic pleated HVAC air filters with 2500 MPR and MERV 14 ratings, trapping 77% of small particles and up to 90% of airborne virus particles. They capture pet dander, smoke, bacteria, lint, pollen, dust mite debris, and mold spores, are certified asthma and allergy friendly, and each filter lasts about 3 months.