Fan 5015 12V 0.15A Sleeve Bearing Brushless Fan This is an easy-to-use Sleeve Bearing Brushless Mini Blower fan. It just needs to be powered by a 12V DC source. The blower fan increases the velocity of air. They are mainly used for exhausting, cooling, ventilating, etc. HE3D 12V DC 3D Printer Accessories 5015 Vortex Cooling Fan is made of special and premium materials. It is high-temperature resistant and extremely durable. Excellent for cooling heat sinks on hot ends, prints, or other cooling needs. It is made of high-quality PBT + 30% glass line + VO and Bearing with high precision makes it provide long life and low noise. It can be taken in use to handle the temperature cooling  75?. Its Working temperature is 40? with a continuous working of 24 hours capacity. Additional applications include forced cooling of PCB & PCB Components, active cooling of the hot end extruder, and SBCs like Raspberry Pi, Beaglebone Black, etc. It can also be used in conjunction with a heatsink to improve cooling and provide better airflow. read more : Why are DC fans more efficient than AC? Applications: Cooling of PCB & PCB Components Cooling of the hot end extruder Cooling Raspberry Pi Boards