OEM Cage Cooling Fan for SFF Tower Desktop series, this is the cooling fan for REAR side of Cage, ONE FAN enough for ONE PC. If your PC fan is running very loud or not functioning then a replacement may be needed. Brand NEW and GENUINE from OEM Factory that has never been used if you PURCHASING from DEAL4GO, NOT a PULLED parts. Sqare Part Number(s): 441154-001 Compatible Part Number(s): EFB0812HHB 6Y02 Cable overall Length approx: 9.0 cm/3.60-inches Direct Current: DC 12V/0.4A, 48.8 CFM Min Connector type: 4-pin 4-wires, Wire-to-Board Dimensions (LxWxH): 8.0 x 8.0 x 1.5 cm / 3.15 x 3.15 x 0.6 inch Operating Supply Voltage: 12 VDC Airflow: 48.8 CFM (1.38 m3/min) Speed: 3800 RPM Bearing Type: All Noise: 41 dBA Power Rating: 3.96 W Reference list of compatible with Desktop models: Z240 Workstation Z230 Workstation Elitedesk 800 G1 ProDesk 600 G1 Z440 WorkStation Optiplex 7040 Small Form Factor Optiplex 3040 Small Form Factor