Supermicro FAN-0087L4 1U 40x56mm 4-pin 12K/18K RPM PWM Fan
Easy installation and excellent cooling
Counter-Rotating Fan - 40 x 40 x 56mm
Fully tested, and validated by Supermicro
Compatible with Various Supermicro Chassis
1U, 40x56mm, 4-pin, 12K/18K RPM PWM Fan - For SC512F and SC811 Chassis, PB-Free