This rain chain is constructed of a thick, pure aluminum 5/16" chain, then powder-coated with a black matte finish. Lightweight and stiff, this value priced chain will add a designer look to your gutter system. Powder coating is a type of coating which includes metal that is applied as a free-flowing, dry powder. The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a "skin". It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals.Link length: 2 1/4", width: 1 3/8", thickness: 5/16".Pure, thick aluminum linksBlack powder-coat finish.Rain chain installation is simple and only takes a few minutes.Rainchains are an artistic downspout.Includes 3" Black Aluminum Installation Kit.NOTE: Link style rain chains can handle a limited amount of rainfall. In a downpour, some water will leave the chain and splash to the sides and down.. If you are installing this near an entrance, be advised that splashing occurs. Cup style rain chains by design handle water flow more efficiently than link style rain chains.