WINSINN 50mm fans all use Dual ball bearings
?Dual ball bearings - High Speed
?High quality Dual ball bearings, More stable and Long life, suitable for continuous work. Use time can 24 hours /day. The life expectancy is more than 60,000 hours. No maintenance required.But Lubricating oil can further reduce noise.
?Size: 50x50x15mm
?Rated voltage: DC 5V / 12V / 24V
?Line length: about 11.8in / 300mm