Features and specifications: 1) Standards: ASTM A53, SCH 40 and BS 13872) Outer diameter: 9.6 - 76mm3) Wall thickness: 0.4 - 3.0mm4) Outside and inside can be zinc-coated5) All possible shapes are available6) Widely used in scaffolding, petroleum, water system and construction areasPacking: in bundles producing area:China payment:L/C, T/T