Product Features Compact size, high efficiency, and large dust holding capacity; primarily used for ventilation system filtration.   Applications Used for general air purification in the electronics, pharmaceutical, mechanical instrumentation, metallurgy, petroleum, chemical, light industry, and food industries. Materials and Operating Conditions Filter Material: Chemical fiber non-woven fabric Frame Material: Aluminum sheet, galvanized sheet, paper frame Sealing Strip: White latex, general-purpose adhesive Filtration Efficiency: 45%-95% @ 0.5μm Aluminum Profile Thickness (mm): 21, 25, 46, 50, 69, 80, 90, 96 Maximum Operating Temperature: 70°C Maximum Humidity: Paper frame: 80%; Other frames: 100%   Pleated Medium Efficiency Filters Specifications