Features sleeve/ball bearing , the fan can be work very quiet and silent, you may hard to hear the noise of it , but it also offer you 47 CFM airflow . The fan can work smoothly for 50,000 hrs at 25 ℃.
DC cross-flow fan can be supported by sleeve or double ball bearing support, which has low noise, anti vibration, long service life (50,000 hours) and high rotation precision.
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