Most Powerful of All 120mm Fans, Ultra Strong Monster, High Quality Long Life Size: 120mm x 120mm x 38mm, Dual Ball Bearing, Speed: 4000 RPM, Air Flow: 200 CFM, Noise Level: 59dBA This super high-cfm-speed fan design for big pc or server CPU cooling component, also could be used for refresh air for your Underground Garage, Cellar or another space you want Package Includes: 2x High CFM Fan + 2x Metal Finger Guard Grill + 8x screws and nuts