FAN-0101L4 is a 40mm 4-pin redundant super quiet fan assembly made by Supermicro. It is designed for use in their server and workstation systems, and is wall mountable. The fan runs at a maximum speed of 5200RPM and has an air flow rate of 33.39CFM, while making only 23.9 dB of noise at maximum speed. It also comes with a 4-pin PWM control connector and a rubber gasket to provide a secure fit.