Ruffled High-Efficiency Air Filter Aluminum Plate Frame, For Ventilation System YAYE Ruffled high-efficiency air filter aluminum plate frame, for ventilation system. Suitable For Clean Rooms. Aluminum Alloy Frame. Product Description Frame material: The frame is made of lightweight, corrosion-resistant and easy-to-process aluminum profiles. High filtration efficiency: It can be classified into types such as HEPA filters and ULPA filters, with filtration efficiencies reaching