The Glasfloss Z-Line Series ZXP self-supported pleated filters offer MERV 10 efficiency with superior durability and low pressure drop. The Z-Line Series features a uniform 100% synthetic, self-supporting media design that achieves a MERV 10 per the ANSI/ASHRAE 52.2 Test Standard. The pleated filters are 100% incinerable since there are no metal parts used within the construction. The Z-Line ZXP incorporate exclusive double wall internal torsion box technology. The pleated filters can withstand greater abuse in shipping and handling due to the absence of metal component parts as well as the durable self-supporting filtration design. The Z-Line Series self-supporting pleated filters offer excellent performance and value for a large array of applications. The Z-Line ZXP filters are environmentally friendly and have less impact on landfills. Produced in Texas, Wisconsin, Nevada and Ohio.