Galvanized Steel Rectangular Tube is a long steel tube with a rectangular cross-section. Steel with high carbon content for strength, good resistance to force.

Black Steel Rectangular Tube has a longer length than the width, so the cross-section of the steel box is rectangular. Normally, Black Steel Rectangular Tube is used to make beam structures, steel frames, frames, railings...

Galvanized Steel Square Tube is a box steel made up of large (corrugated) steel plates of optional thickness and hollow construction.

Black Square Steel Tube is a square box of steel made from hot-rolled steel sheets. This steel has a blue-black surface, in addition to black box steel, there are also galvanized steel boxes on the market with similar specifications.