Product Description The Scorpion 30mm Dual Cooling Fan is designed to assist in the cooling of ESC in airflow denied conditions. This fan is used on the Tribunus III 14-150A / III 14-220A ESC Max Voltage : 8.0V Specifications Length : 61.5mm (2.42") Width : 30mm (1.18") Thickness : 12.4mm (0.49") Weight : 24.0g Fan Speed 8.0V : 16000 RPM Weight including packaging 40g