be quiet! SILENT WINGS 4 - 140mm PWM White

Optimized fan blades for the highest performance on heat sinks Small tip clearance and a fan frame with funnel-shaped air outlets for extremely high air pressure Virtually inaudible operation at regular speed 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations Anti-vibration mounting with push pins and screwed installation option Super-long lifespan of up to 300,000h Elegant look in an all-white design 5-year manufacturer warranty