Product Features: effective filter area, low resistance, long life; small footprint, 100% can be incinerated, environmental compliance, product-by-station leak detection and scanning tests. Frame material: Polypropylene; media: fine glass fiber filter paper; Efficiency: 99.99%, 99.999% (DEHS counting method) Uses: General ventilation systems and a variety of wind capacity purification equipment, the central air-conditioning system architecture design is more compact.