... ,hypro bearing 3.Certification:CE UL ADDA AD8020 12V DC Cooling Fan General Specification 1Electric Strength 5mA max ... Plastic Material Motor protection and polarity protection ADDA AD8020 12V DC Cooling Fan detailed specification:1. frame size(mm): ... type: ball,sleeve,hypro bearing3. rated voltage:5V 12V,24V4. rated speed: 2000~4500RPM5. maxiam air flow ... : CE,TUV,UL,cUL ADDA AD8020 12V DC Cooling Fan