Features:Excellent for cooling heatsinks on hot ends, prints, or other cooling needsMade of high quality PBT+30% glass line +VOBearing is high precision, long life and low noiseSpecifications:Temperature of usage environment: -20℃ to 75℃Working environment temperature: 40℃Service life: Can be continuous working 24 hoursSpeed: 4200±10%RPM (r/min)Voltage: DC 24VRated current: 0.1ASize: 50 x 50 x 15mmInlet size: 31mmOutlet size: 20*15mmNoise: 25DBAStructure: Sleeve bearingPackage included:3x Cooling Fan