This is a nice, premium product, Made in USA. Thick UV resistant 3 blades and hub designed for our Cutting Edge Power Mini Wind Turbine. It is sized to fit an 1/8" diameter shaft. It is press fit on with 3 set screws included to lock the blade to the shaft. This blades are tested in a real engineering wind tunnel. Aerodynamic grooves on the blades create a thin turbulent boundary layer on the surface, which allows the blade to flow smoothly through the wind.
Also fits Pacific Sky turbines.