Model Number: Sino-steel square bars-1# Brand Name: Sino Souces Key Specifications/Special Features: Black carbon steel square pipe, Q195, Q235, Q345 Outer diameter: 1/2 to 18 inchesWall thicknesses: 0.8 to 16mmLengths: 1 to 16mMaterials: Q195, Q215, Q235 and Q345Meets ASTM, ANSI, DIN, BS and GB standardsZinc coating: 280 to 320 or more than 340g/mSurface: logo painted on surface or customizedThreaded and couplings are availablePackaging: bundle or plastic cap, woven bag