Aluminum Frame Custom Air Filters, Polyurethane Sealed H14 HEPA Filter YAYE Aluminum Frame Custom Air Filters, Polyurethane Sealed H14 HEPA Filter. 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 99.97% (for 0.3μm