Features 1、The main barrel is made of aluminum alloy, high strength and is not easy to deform, avoid scratching the inner wall of the main barrel by the blades. 2、A rectifier with a larger horn diameter to meet the needs of FRP model aircraft products, fit for most ducted model 105mm RC plane on the market. 3、There is only a 0.5mm seam between the blade and the main cylinder wall, and the efficiency of the duct is high. 4、The blade is made of carbon fiber mixed materials, high strength and toughness, not easy to deform or break, pure sound when rotating at high speed. 5、The motor mounting seat has a certain degree of heat dissipation, and the installation is not easy to be offset, so as to avoid the axle deviation and cause damage or fly accidents. 6、Separate blades, each piece of weight error accuracy is small, and the motor can ensure high‑efficiency operation without resonance. 7、Separate blades are assembled with high precise and free symmetrical, convenient and flexible during dynamic balance testing of blades, quick pairing, and high test passing efficiency. Item Type: RC Ducted Fan Material: Aluminum Alloy+Plastic+Copper Color: Black+Silver Size: Approx. 105mm/4.1in Weight: Approx. 1316.0g/46.4oz Number of Paddle: 11Pcs Fan Blade Type: Vortex Blade Type Motor Model: 4270 750KV (External Rotation) Suggested Battery: 6Sx2,5200mAh 60C(not include） Suggested ESC: 160A Motor: Motor Shaft: Approx. 8mm/0.3in Motor Shaft Length: Approx. 17mm/0.7in Installation Hole Distance: Approx. 25mm/1.0in Installation Aperture: M4 Test: Test battery: 12S, 5200mAh, 60C, Lithium Battery Test Current: 118A Maximum Thrust: 7.4kg Suitable for 105mm RC Plane 1. The measurement data is all measured in the actual use environment of the laboratory (a fully-charged lithium battery), and may be different from other power measurement standard data. 2. The balance test has been carried out before shipment Package List 1 x RC Ducted Fan 1 x Manual