Product Features: 1.Aluminum alloy, metal material 2. High brightness polishing 3. Fluid design, low wind resistance There are two ways to install the hood. 1. The conical nut is fixed to the main shaft of the engine, and the conical nut is 10MM. 2. A 5MM screw in the propeller hood is fixed directly on the central hole of the engine spindle. Note: At present, all fairs can only be fitted with the E propeller. Because of the different shapes of the blades, the length and size of the fairs can only be roughly consulted. Check your engine shaft diameter carefully. Strictly, take out the actual blades and fairs, and install them manually.