Up to 90 days effective against pollen dust lint dust mite debris pet dander mold bacteria virus carriers smoke smog lead dust microscopic allergens and oil smoke Features . Dimensions 14 W x 25 L x 1 H. Filter Material Polyester Synthetic. Minimum Efficiency Reporting Value 13 MERV. Filters Pollen Yes. Filters Mold Yes. Trimmable No. Filter Frame Material Moisture Resistant Die Cut Chipboard. Pleated Yes. Filters Dust Yes. Filters Bacteria No. Metal Mesh Support Yes. Filters Smoke Yes. Electrostatic Yes. Lasts up to 90 days. wire backed media Specifications . Dimension 14 75 H x 11 W x 25 5 L. Weight 6 2 lbs