For sale is ONE kinetic copper wind sculpture with a theme of Double Windmills. The blades are positioned so the dual spinners will spin in opposite directions once caught in the wind. The entire wind sculpture including the pole and its fixture is made of pure copper with brass hardware. The only metal is the stainless steel ball bearings that are completely covered by brass hardware. Two ball bearings make the two windmill wheels move independently and opposite from each other. A third bearing makes the kinetic sculpture swivels 360 degrees in the wind. The pole is made of heavy gauge copper and secured into the ground by an all copper 4-point anchoring system. With its heavy duty construction and swiveling head, this kinetic sculpture can withstand strong winds up to 70 mph. The copper blades are not coated and will age naturally. If you want to preserve its original copper shine, you may spray a layer of clear coat on it. We have had great success with clear coats made by Rust-Oleum and Permalac (Peacock Labs). The craftsmanship on this kinetic sculpture is impeccable. The windmill wheels are finely balanced and maintenance free. The sculpture is entirely weather proof and made to last for decades.