Description:High-quality double ball bearings make its operation more stable. The long service life makes it very suitable for continuous work.High adaptability and compatibility make it very reliable and practical. And the low noise will not affect you to do other things.Made of plastic material, it is very durable to use.The length of this product is 2.5cm, the width is 2.5cm and the height is 1cm.It can let your 3D printer or other experimental tools quickly dissipate heat and extend the service life of the development board. Its using time can be 24 hours/day. The life expectancy is approximately 60,000 hours. No maintenance is required, but lubricating oil can further reduce noise.Item Name: FanMaterial: PlasticModel: 2510Bearing: Oil BearingWorking Voltage: DC 24VSuitable For: Hot End of ExtruderFeatures: High Speed, Easy to Install, Fast Heat DissipationSize Details: Size: 2.5cm x 2.5cm x 1cm/0.98" x 0.98" x 0.39" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:2 x Fans