The SilverStone AS120B Air Slimmer 120 Enhanced Performance 120mm Slim Fan - Black is a full-range PWM 15.6mm thick fan that is perfect for compact builds. Its unique 9 scimitar fan blade design allows for high air pressure, making it effective for quickly dissipating heat through radiators or heatsinks. In addition, it can also serve as an efficient exhaust fan for removing large amounts of heat from systems. This fan features an all-copper Fluid Dynamic Bearing (FDB) which offers superior performance and a long lifespan.