This 1-1/4" x 1-1/4" square steel tubing with 16 gauge (0.065") wall thickness is a versatile structural material ideal for fabrication, construction, and repair projects. Manufactured to meet industry standards such as ASTM A500 Grade B or A513 (depending on size), this tubing offers excellent strength, durability, and consistency. Perfect for use in frames, trailers, brackets, supports, shop projects, and general fabrication, this square tube is easy to weld, cut, drill, and machine with standard equipment. The square profile provides superior strength and rigidity compared to flat or angle materials. Each piece is precision cut to your selected length, making it ready to use right out of the box with no additional cutting required.