Autolizer Sleeve Bearing 120mm Silent Cooling Fan for Computer PC Cases, CPU Collers, and Radiators - High Airflow, Quite, and Transparent Clear (Purple Quad 4-LEDs) - 2 Years Warranty 120mm x 120mm x 25mm Seven fan blades and a sleeved bearing system for less vibration, noise and turbulence High static pressure for efficient radiator or heatsink cooling Rohs compliance for protecting the environment Tuned for high-airflow, large volume cooling | up to 50, 000 hour life span | 4 pcs mounting screws included