The surface of the casing is treated by plastic spraying process, which has the characteristics of environmental protection, temperature resistance and stronger adhesion; Balanced impeller adopts multi-wing structure, which has stronger suction force and higher efficiency Brushless Motor of light weight and good heat dissipation.100% copper wire, temperatureresistant of 90 Celsius degree. Stepless regulator can be select, adjust the air volume and pressure of the fan by adjusting the frequency of the motor and changing the speed of the motor. This fan can be widely used in extruder heat dissipation, kitchen equipment, electronic equipment, duct ventilation, aeration model, purification equipment, telecommunications and other fields. Welcome and I wish you a happy life, my friend.