The fact that good quality does not have to be expensive is shown by the third version of the NB-BlackSilentFan series. The well-balanced properties of this bestseller make this inexpensive and high-quality series of fans the absolute bestseller throughout the world.Specification:- Dimensions: 92 x 92 x 25 mm- Weight: 86g- Colour: black / blue (semi-transparent)- Volume: 17 dB (A)- Speed: 1,500 rpm- Airflow: 50 m / h- Air pressure: 0.946 mm-H2O- Starting voltage: