These small fans offer good cooling characteristics when printing because it generates high airflow. Excellent for cooling heat sinks on hot end, 3d printing; Widely used in humidifier, aromatherapy and other small appliance series; Small heat radiation communication equipment; PC CPU server cooling dissipation etc. Feature - Color: Black. - Material: ABS. - Size: 5.00X5.00X1.50cm/1.97X1.97X0.59 inch. - Rated voltage: DC 12V - Rated current: 0.15A - Speed: 5000±10% - Bearing: Oil-impregnated bearing - Noise: 25dBA - Great cooler for cooling hot ends, extruder, prints and other parts on 3D printer. - Made of plastic, fine workmanship, environmental protection, safety. - bearings, more stable and Long life, suitable for continuous work. - Adopts precision production to the stable characteristics and high reliability. - Professional and practical design with beautiful appearance, easy to carry and use. Package list: 3 x cooling fans