Synthetic Media Extended Surface Filters with Labyrinthine Structure has an extended surface due to pleating. Synthetic Media Extended Surface Filters with Labyrinthine Structure is manufactured by Airtech. The Company has validation of clean rooms done as per ISO 14644. Airtech also manufactures various types of air filters and cleaning equipments. The Synthetic Media Extended Surface Filters with Labyrinthine Structure, Series 150, is sandwiched between two layers of HDPE mesh which act as retainer and screens out large particles and prevents them from being embedded in the media. These Filters are recommended for non-critical industrial applications and can easily be installed in standard air handling units, or mounted in banks.