Features and specifications: 1) Standards: ASTM A53 SCH 40 and BS 1387 2) Outer diameter: 9.6 - 76mm 3) Wall thickness: 0.4 - 3.0mm 4) Outside and inside can be zinc-coated 5) All possible shapes are available 6) Widely used in scaffolding, petroleum, water system and construction areas Packing: in bundles