MASSCOOL SLC-FD12025 120mm Case fan with fan guard and Speed control bracketMASSCOOL SLC-FD12025 120mm Case Fan, Compatibility: Case Fan Size : 120mm. With Speed control bracketBearing Type: 2 Ball, RPM: 1200 RPM +/-10%, Air Flow: 42.7 CFM, Noise Level: 21 dBA, PWM function, Power Connector: 4-pin power supply 3-pin motherboard : Color: Transparent.Physical Spec: Dimensions :120 x 120 x 25 mm , Features: Silent fan , Fan Guard, Speed control bracket.