16x25x4 Pleated Air Filter MERV 11 - Highest Quality - 3 Pack - Actual Size: 15 &frac12; X 24 &frac12; X 3 Proudly Manufactured In The USA The 82-R MERV 11 pleated filters are available in a wide range of sizes for all commercial, industrial and residential applications. The filter media is a 100% synthetic, electrostatically charged media, designed to attract and hold airborne contaminants. The 82R Merv 11 results in a higher efficient filter , 80-85 @ 3-5 micron, over 90% @ 7-10 micron without sacrificing airflow. The filter pack is bonded to the inside periphery of the frame, thus eliminating the possibility of air bypass.