Features: 100% brand new and high quality Maintenance-free double ball bearing, long service life 6000RPM high speed, sufficient heat dissipation air volume and wind pressure. PWM temperature control version, supports 4-pin PWM intelligent temperature control speed, With high precision ball bearings.Can be installed in CPU radiator, or used on the chassis. Large air volume design, stable air flow, low noise and large air volume. Package Includes: 1 PC x W12E12BS11B5~07 Cooling Fan Specifications: Model: W12E12BS11B5-57 Size: approx 120x120x38mm/4.72x4.72x1.5in Bearing: high precision double ball bearing Voltage: 12V Current: 1.65A Rotational speed: 6000RPM Noise level: 70.5DBA Air volume: 267CFM Working life: 10.0000 hours Material: Plastic note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!