For 400mm 50 60hz fan, 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 400mm 50 60hz fan has been well received by many customers and enjoyed a good reputation in many countries. Blauberg Motoren 400mm 50 60hz fan have characteristic design & practical performance & competitive price, for more information on the 400mm 50 60hz fan, please feel free to contact us.