Feature: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 noiseTemperature of usage environment: -20℃ to 75℃Working environment temperature: 40℃Service life: Can be continuous working 24 hoursSpeed: 4500, 6500 (R/min)Voltage: DC 12VSize: 50 x 50 x 15mmStructure: Sleeve bearingPackage included:3 x Cooling Fan