The hydraulic fan is placed between the sliding fan and the ball fan. It is cheap but has a long service life. Its advantage is ultra-quiet operation.
 
Dimensions: 40mm * 40mm * 10mm
Voltage: 24V
Rated Current: 0.1A + 10%
Rotation: 5500RPM ± 10%
Lifetime: 30000hrs at 40 ℃
Min. Flow: Over 4.65CFM Max.
Static pressure: 5.15mm-H2O