Square Tube Diameter: 16X32 , 15X30 / 25X25 , 30X30 , 38X38 Length: 1m~4m. Thickness: 0.4mm~3mm Surface: Chrome Materil: Stee Square TubeDiameter: 16X32 , 15X30 / 25X25 , 30X30 , 38X38Length: 1m~4mThickness: 0.4mm~3mm .Surface: Chrome.Materil: Steel. Square Tube