For G4 pre filter, everyone has different special concerns about it, and what we do is to maximize the product requirements of each customer, so the quality of our G4 pre filter has been well received by many customers and enjoyed a good reputation in many countries. GUANGDONG VITE AIR CLEAN SYSTEM CO.,LTD G4 pre filter have characteristic design & practical performance & competitive price, for more information on the G4 pre filter, please feel free to contact us.