"Small Cooling Fan" good radiator, the edge will not burr, fin no distortion, no cracks at the bottom smooth, neat appearance, shape and generous, with warranty, security signs or other characteristics, such as trademarks. In addition, everyone in selecting "Small Cooling Fan" Also note that the bottom of the radiator when the radiator is not too thick, because the thermal conductivity of aluminum is not very good, too thick will affect heat transfer; another "Small Cooling Fan" diversion tank radiator surface should be some secret, so you can make sure that the radiator and the air can have a larger contact area, thereby enhancing the cooling effect.