1. Military aviation filter technology 2. Belongs to AVIC bloc 3. ISO\TS16949 4. ISO14001 5. OHSAS18000 YUYONG BUS AIR FILTER OEM NO. 9103-02020513/AF25691 Applicable engine: YUTONG BUS We are a direct manufacturer of oil filters, fuel filters and air filters SINCE 1979. Filters for engines, engineer machinery, passenger cars, bus, commercial vehicles, heavy-duty and light-duty trucks etc.