This is an Ultra Strong and high flow rate AC 120mm Fan and you will be amazed by the amount of wind it blow! Ideal for computer cooling system ,any other kinds of cooling or help your space be full of fresh air, and you won't be disappointed. Must be careful for the blades as it spins in very high speed! This item provide two pieces Silver Metal Grill on the fan back side for safety. Specification Model： 12038 axial fan Bearing: Double Ball Speed:2600/3000 RPM Airflow: 120CFM Noise Level(max): 35/45dBA Power Connector: Wire length：almost 4-feet Rated Voltage: AC 115V Operating Voltage Range: 100 - 130V Input Current: 0.21A (0.24A max) Input Power: 12.5/15W FAN size: 120mm x 120mm x 38mm(4.725" x 4.725" x 1.5") Item weight: 650g (1.43Ib) Package includes: No.1: 120x120x38MM AC axial fan( I pcs) No.2: 4-feet US 110/125V axial exhaust fan power cord ( 1 pcs) No.3: Metal axial fan grill guards( 2 type, each 1 pcs) No.4: M4X65mm Screw set for quick mounting( I set with each 4 pieces) No.5: M5X65mm Screw set for quick mounting( I set with each 4 pieces) Note:I have to say it's the MOST POWERFUL OF ALL 120mm fans, a Monster of ac axial fans,super power of move a considerable amount of air. If you don't need our cooling fan too much power,you can add a Speed Controller by yourself.