Accumulair Diamond 29.5x36x1 (Actual Size) MERV 13 Air Filter/Furnace Filters (6 pack) Actual size measures 29.5 x 36 x 0.75 Great for helping reduce airborne allergens such as bacteria, particles that carry viruses, pollen, mold spores, fine dust, and pet dander Each filter lasts up to 3 months Electrostatically charged filter media captures airborne allergens smaller than 1 micron Merv 13 rating