3-1/2" x 3-1/2" Hot Rolled Steel Square Tube with a 0.120" wall, supplied in a 240" length. Conforming to ASTM A500 Grade B, this structural tubing features 58,000 PSI tensile strength, excellent weldability, and a high strength-to-weight ratio. Ideal for heavy structural frames, industrial supports, and equipment bases where durability and load-bearing capacity are critical. In stock for Los Angeles pickup.