Manufacturer Specifications Model: GFM0812DS-SMB7R Manufacturer: Delta Electronics Description: 80X56MM 12V DC FAN W/PWM CONTROL Uses: fan, thermal management >> DC fan Minimum order quantity: 1 series:- Size / Size: Square - 80mm long x 80mm high Width: 56.00mm Airflow: 93.2 CFM (2.61m3/min) Static pressure: 4.485 inches of water (1117.2 Pa) Bearing type: ball Fan type: tube shaft type (double) Features: PWM control, speed sensor (tachometer) Noise: 73.3 dB(A) Power (W): 28.80W RPM: 12500 front, 11000 behind Termination: 4 wires per lead