"220V Cooling Fan" fireproof PBT fan blades to prevent the high temperature combustion modification (Market Most fan blades are made of recycled materials, such as the case of fire will burn, not fireproof). It is mounted inside and outside carton packaging, during transport to avoid the fan housing in particular a ball bearing damage. # 1007 lead wire 22 GB, the ability of high-current, high voltage, do not create other problems due to problems caused by the wire. Each fan factory testing: test the fan voltage and current, abnormal sounds, with or without impurities, presence or absence of abnormal phenomena. Fan factory guarantee 100 percent qualified. High-pressure test: Each fan factory hit high-voltage 2500V, to ensure 100% no leakage phenomenon.