Cross Flow Fan , It's impeller diameter is 48mm; It's impeller length ... , water pump motor and centrifugal fan .this fan is most used in electrical andiron ,fan heater ,exhaust fan and so on. it has ... our company ,but also in foreign country.our company adovacates large quantity ,low price.we alwanys have regular costomers ,but ... by your actual requirements.certificates of our product . cross flow fan