High-efficiency commercial-grade pleated filters available in 1″, 2″, and 4″ sizes. Designed to capture a broad range of particle sizes including fine airborne contaminants. Built with advanced synthetic electret and mechanical media for powerful performance with low pressure drop.Engineered for high-efficiency filtration while supporting proper airflow in demanding environments. UL listed and supported LEED requirements within the U.S. Green Building Council program.Dimensions shown are nominal. Actual sizes are slightly smaller. Standard and custom sizes are available. Sold in cases of 12 each for 1″ and 2″ filters, and 6 each for 4″ filters.