DetailsMade of 14 gauge steel and come with a one year warranty on the finish and a lifetime warranty on all workmanship. A three step finishing process is used- First a zinc plate for better adhesion and durability, then a bake on an antique copper vein powder coat followed by a clear powder coat to protect against the UV rays. This provides a durable, scratch resistant finish. Sealed ball bearings in our windcups to keep them spinning freely with even the slightest breeze. Tops are laser cut in one piece, minimizing welding and making them a unique addition to your home. Tops are interchangeable and easy to change.