172mm 6 inch Copper Coil AC cooling fan 1. It's also called 17251, 17050, 17052 and 17250 AC fan. 2. Factory direct supply, zero outsourcing, reduce finished products, guarantee quality. 3. The company can customize products according to customer needs and provide special services. 4. It is widely used in mechanical equipment, frequency converters, ect. 5. It has high speed, large air volume, low noise and long life.