TOM TORRENS Copper Tone Iron Hand Crafted Acorn Art Birdhouse with Solid Steel Hanger for Secure Placement. Copper finnished metal sections with hand-applied patina and protective clear coat finish Heavy Wrought Iron hook and ring with cast iron finials in weather resistant powder coat finish Wire mesh interior floor for porper ventilation and sanitation Ventilation holes in metal housing, removeable perch Rain Shield cover over entry hole, Entry hole sized tod discourage predeators