1900 rpm fixed speed: The speed of the fan can still be changed under voltage control. OPTIMIZED FOR STATIC PRESSURE: Due to the high static pressure, the fan guarantees efficient cooling even with increased air resistance. Suitable for use on heat sinks & radiators HIGH QUALITY BEARING: A combination of alloy/lubricant developed in Germany reduces friction within the bearing. Excessive heat build-up is prevented TECHNICAL DATA: Fan speed: 1900 rpm, Airflow: 23.96 cfm 40.70 m³/h, Static pressure: 1.32 mmHO, Pin: 4-pin fan connector