Material: P.B.T. Voltage Rating: 12 V Start Voltage: 9V Weight: 122 g 4pcs. white LED. Copper axis with long life sleeve bearing to provide long-term life and stability. Waveform and enhanced lubricant circuits to provide outstanding aerodynamic efficiency. Wave Shaped and small hub dimension generate extra high airflow. Wave Blade technology increases 25% of air flow and drops 10% noise.