Corrosion resistance zinc-coated steel framework that is thoroughly cleaned during the pre-treatment process, then color coated with a 3 mil minimum polyester layer for dual protection from corrosion. Long service life- all galvanized wire has a 15 mil minimum extruded polyvinyl chloride coating for dual protection from corrosion and the elements. Superior strength- Fittings are made of galvanized steel with a 6 mil minimum of polymer coating for added protection.