All weathervanes include a copper figure, a brass & stainless steel rod, copper spacer balls and solid brass directionals. The weathervane figure and spacer balls are made of pure copper. The directionals are made of solid brass, and the rod is brass and stainless steel, which will ensure rust free, maintenance free enjoyment. The green finish is referred to as "patina." This is an artificial finish applied to give the weathervane the appearance of an antique. After assembly, these weathervane figures are placed on buffers to give them luster and shine.Within one month the weathervane will lose its polished look and start to naturally tarnish on its own.