Hydraulic Bearing 4010 Cooling FanHigh quality hydraulic bearing, more stable and Long life, suitable for continuous work. No maintenance required. Power Connection: 2 Pin-SM2.54; Low noise while cooling the temperature inside the bottom of the printer.DC 24V 40mm Cooling Fan at the back of the printer for cooling the temperature inside the bottom of the printer, ensuring stable temperature inside the printer.Made of high quality plastics with high end bearings, this 3D printer part cooling fan can run continuously for days at high speeds without hassle or concern.Size:40*40*10mm(L*W*H), Speed:5000±10%RPM, Noise:21.2dBA, DC 24V, 0.05A.