Copper Pipe Lines for Water Heaters and Water Boilers Zhuji Shuanghao Machinery Co., Ltd. Base Info Standard:DIN, ANSI, GB, JIS, BSWMaterial:CopperConnection:WeldingSurface Treatment:WashedHead Type:RoundTrademark:STransport Package:Cartons, PalletsSpecification:customizedOrigin:China Description Pre:High Quality Carbon Steel DIN 434 Square Washers with Preferential Price and High Strengh Next:High Quality Stainless Steel Hexagon Nuts DIN934 with Yellow and White Zinc