SGCC DX51D 4X8 galvanized gutter sheet is a specific specification galvanized steel sheet product. Usually the thickness is 0.21-0.50mm and coating is Z30-Z40. The following is a brief description of its product characteristics and applications. Material Characteristics: DX51D: This is a galvanized sheet material which is a non-ferrous alloy composed mainly of zinc as the base and ot... http://shaiyia.com