Supermicro FAN-0116L4 4U 80x80x38mm (4-pin) 82KRPM PWM Fan
Nidec Axial Fan - 80 x 80 x 38mm
Supermicro Certified, Fan Speed: 8,200 RPM
Compatible with CSE-747BTS and CSE-748TS Series Chassis
4U, 80x80x38mm (4-pin) 8,2KRPM PWM Fan, for SC748TQ-R1400 Chassis (rear) - PB-Free