Aluminum is a silvery white, soft, nonmagnetic, ductile metal. Aluminum is the third most abundant element and the most abundant metal in the Earth's crust. Aluminum is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminum and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials. 

Bronze is an alloy consisting primarily of copper and other metals, which produces an alloy much harder than plain copper.

Copper is a chemical element that is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; it is a building material and a constituent of various metal alloys.  Architectural structures built with copper corrode to give green verdigris (or patina). Decorative art prominently features copper, both by itself and as part of pigments.

Nylon is a generic designation for a family of synthetic polymers known generically as aliphatic polyamides and is one of the most commonly used polymers. Nylon was intended to be a synthetic replacement for silk and substituted for it in many different products after silk became scarce during World War II. Solid nylon is used in hair combs and mechanical parts such as machine screws, gears and other low- to medium-stress components previously cast in metal. Engineering-grade nylon is processed by extrusion, casting, and injection molding. 

Stainless Steel is a corrosion RESISTANT steel alloy. Stainless steel will rust, or TEA STAIN, eventually. Certain alloys of stainless steel have a higher level of corrosion resistance and should be utilized in extreme environments.  This is especially true in a coastal area such as ours.