80mm x 25mm 12V fan, part number AD0812XB-A73GP, has 2 sleeve bearing for long life.
The fan includes a tachometer (fan speed) open collector output, 3 pin motherboard connector
Voltage range, 6 to 13.8V.
Speed, 4500RPM at rated voltage and zero pressure.
Flow (max), 32.37CFM.
Pressure Rise (Max), 0.3inH2O.
Noise, 46dBA at rated voltage and zero pressure, measured at 1 meter to side.
1 x 80MM CPU Fan