Features: 1Good Coordination: First class mold design of the RC duct fan ensures perfect dynamic balance of blades and good coordination between duct and propeller. 2High Performance: The high efficiency RC duct fan is stable and more durable. And it passed good aerodynamic tests, with excellent dynamics. 3Great Materials: Made of premium plastic and aluminum alloy materials, which have better durability and greatly reduces the damage rate. 4Strong Power: Powerful and high efficiency. The size is 80mm, and the 12 blades duct fan conforms to standard design for perfect fitting. 5Application: The RC metal electric duct has super anti interference, and it is easy to install and remove, which is suitable for QX QF3538 motor. Item Type: RC Duct Fan Product Material: Plastic, aluminum alloy. Product Color: Black Application: For QX QF3538 motor. Package Included: 1 x Propeller 1 x Empty RC Duct Fan 1 x Fan Blade Cover 7 x Screw 1 x Main Shaft Screw 1 x Nut 1 x Washer