1.cpu fan 25*25*07mm is high efficiency and low noise; 2.ball bearing 50.000 hours; 3.large volume 12vdc 25*25*07mm mini cooling fan Specifications Size(mm)ModelRated voltage (VDC) Operating Voltage Range (VDC) Current amp (Amp)Rated Input Power (Watt)Speed (rpm)Max air Flow (CFM)Max Static Pressure (Inch-H2o)Noise Leve (dB-A)Weight (g)25*25 * 07YM0502PVS(C)15.003.5 to 5.50.120.6100002.200.16275. ...