The Glasfloss Z Line Carbon Merv 10 Pleated Filter Offers Electrostatic Charged Thermally Bonded 100% Synthetic Fibers To Increase Initial Efficiency. The Z Line Activated Carbon Pleated Filter Helps Reduce Unpleasant Odors Created By Cooking, Cigarette Smoke, Pets And Numerous Other Offensive Airborne Odors. The Gradient Density Media Is Supported By A Galvanized Expanded Metal That Maintains The Pleated Media Pack. The Media Pack Is Sealed With A Heavy Duty Beverage Board, Die Cut Frame And Has A High Dust Holding Capacity. The Z Line Carbon Pleated Filter Is Used In A Wide Range Of Residential And Commercial Applications.