Our 1/4" 304 Stainless Steel plate with heavy duty hinges and tabs are one piece construction, sandblasteed, and powder coated with raven gloss black finish. They are available in both single and dual cylinders for improved performance. The cylinders are strong, durable, and non corrosive, and operated by the same simple rocker type or optional touch button waterproof switch All components are preassembled and are easily and quickly mounted.