High-grade LLS bearing with 100,000-hour MTBF delivers long-lasting dependability PWM support offers a wide 500 to 2,000 RPM speed adjustment range for silent operation under lighter loads and maximum airflow during more demanding activityBoja: CrnaSize: 120 x 120 x 25 mm4-pin PWMRotation: 500 RPM – 2000 RPMNoise: 10 dB (A) – 32.2 dB (A)Airflow: 30.5 CFM – 87.6 CFMMTBF: 100,000 hoursStatic pressure: 0.51 – 1.95 mm H2O