Galvanized Steel Square Tube ASTM A123 is a hollow, square-shaped structural steel tubing that has been hot-dip galvanized with a protective zinc coating in accordance with ASTM A123 standards. This provides excellent corrosion resistance and durability, making it suitable for various construction, industrial, and agricultural applications requiring strength and weathering resistance. Its square shape and galvanized finish make it a versatile choice for projects like framing, fencing, and general structural purposes.