... polarity protectionADDA cooling fans AD9225(T) detailed specification:1. frame size(mm): 92X92X25mm2. bearing system type: ball,sleeve,hypro ... safety approvals: CE,TUV,CE,cULADDA cooling fans AD9225(T) feature:1. high performance-stronger airflow and static ... or more stage of structure designADDA cooling fans AD9225(T) application:server system, communication equipment, projector, power supply, etc ...