Our extended surface pocket filters are designed for a wide range of medium- and high-efficiency air filtration systems, available in efficiencies ranging from 40 percent to 95 percent. In order to ensure compliance with indoor air quality specifications, our extended surface pocket filters are offered in either 100 percent dual-layer synthetic media or microfiberglass media, each featuring an aerodynamic pocket design roll formed to a galvanized steel header. They come in a standard 24”x24” size with variable pocket depths, and are also available to be made in 12”x24”, 20”x20” and 20”x24” sizes.